Lie Detector
Pairing: Matt x f!reader
Summary: Matt thinks that you can't successfully lie to him. The only way to settle the dispute is to challenge one another to a bet, but trying to deceive a human lie detector isn't quite as easy as you'd expect.
A/N: Finally on summer break and I've had time to do some writing. I'm really drawn to a reader/matt dynamic that's super competitive, so... here we are, with yet another "game". Hope it's alright!
Sometimes, having a lie detector as a boyfriend sucked.
You realized this early on, when all of the sudden the white lies that you told habitually in order to protect others' feelings crumbled into a big dust cloud of useless whenever Matt heard them.
Last week at supper, for instance. Matt had cooked a beautiful meal — homemade rolls, oven-roasted vegetables, and your favorite pasta — and it was all delicious. Except for one experimental vegetable thrown in that you were... less fond of, to say the least.
But of course he asked you if you liked it, of course he did.
"It's incredible," you told him, reaching out to squeeze his hand. "The pasta is cooked perfectly. Also, homemade rolls? I mean, these can't even compare to the local bakeries. It's all really good, Matt."
"And the... new vegetable?" he asked, taking a bite.
Shit.
You sat stock still for half a second, your mind whirring. Fortunately, you'd gotten better at dodging situations where typically you would just save yourself with a white lie, but with Matt, there was rarely a safe way out of a question.
"It's got such a unique flavor!" you said warmly. Truth. "I don't think I've ever had it before. Where'd you get the recipe?"
"Foggy's sister. It is unique," he agreed. "You like the taste?"
Damn it. Something told you that Matt suspected you didn't like it; why else would he be so persistent about asking? "It's so unexpected," you hedged. "You cooked it really well."
Which was also a truth. The texture was good, at least; Matt had roasted it perfectly. It was the flavor you were less keen on, and you had to fight the urge to drink water after every bite.
Matt's lips turned upwards. "Sweetheart, you don't have to choke it down for me."
From there, everything unraveled. "I love it," you tried to say, but Matt's eyebrows were raising and you yourself could feel that your heart was speeding up. "Really! I love it, it's fantastic—"
You loaded your fork with it, preparing to take a large bite out of a manic desire to ensure Matt didn't find out the truth, but he deftly reached forward and grabbed your wrist. "Lost cause, Y/N." His thumb grazed your wrist, as though to match the sensation of your pulse to what he could hear.
You reluctantly put the fork down. "Come on, Matt, stop reading me for once! You cooked a beautiful supper and I want you to know how much I appreciate it—"
"You can appreciate it while letting me know you don't like a certain type of food. I promise my ego isn't dependent on a single vegetable."
"But I feel bad!" you protested. "And with anyone else, I would have just lied and said it's amazing, but with you, I have to be a schmuck about it!"
"You're not a schmuck."
"Matt, I'm a schmuck." You pointed at yourself. "Terrible, horrible, no good, very bad schmuck. Plus, it's unfair. I'm sure you lie to me all the time, and I probably just don't even notice it. Like last week, when I asked you if I have a nice voice to listen to and you told me that me that it's music to your ears, or some crap like that."
"It is music to my ears."
"I call bullshit. Unless by 'music' you meant death metal or country."
"So start lying to me," Matt said, his fingers absently moving up your forearm. "If you're able to control your nervousness when you do it."
"Is that a challenge? I'm sensing a challenge."
Matt was smiling now, and it wasn't his charming smile, it was what you thought of as his shit-eating grin. "Aw, let's not call it a challenge. I know how upset you get when you lose."
"That's it." You slapped his hand away from your arm. "Prepare to be lied to. Constantly. And if I succeed, and you don't notice that I've lied to you, then you have to..." You thought for a moment. "You'll have to wear your Daredevil suit to Foggy's when we have dinner with him and Karen on Sunday night."
Matt's smile dropped instantly. "Why the hell would I do that?"
"Um, obviously because it would be hilarious seeing you uncomfortable, and Foggy and Karen would take some awesome pictures of you?"
He grit his teeth as though contemplating. "Fine. And if I win, and I notice every lie, you can go through all of the old archives sitting in Karen's filing cabinet at Nelson and Murdock and make copies so that they can all be organized by legal topic as well as by date."
"What? How is that fair? That's hours of my time!"
"I thought you said you were confident that you'd win?"
"Well. Yeah." You leaned over to playfully shove at him. "Okay, then. I'm in."
"But if you actually are apprehensive about this bet, then we don't have to do the challenge. I won't hold it against you."
Bold way to throw down the gauntlet, Matt. There was no backing out now. "Nope. Deal accepted," you said, and stood up to clear the plates. "Oh, and by the way, I don't get 'upset' when I lose. I'm a fantastic loser."
"Lie," Matt said, almost lazily.
Damn.
That was how it began. Of course, together you enumerated more rules, both printed and in braille, and posted them on the fridge.
Rule Number One: A lie had to be the subject of whatever you were talking about. It couldn't be a throw-away comment unrelated to the conversation itself, nor could it be anything so minor that it didn't even matter. It was forbidden to, for example, tell Matt about your day and say green shirt when you were actually referring to a blue shirt and count that as a lie. It had to stand on its own, loud and proud.
Rule Number Two: You had forty-eight hours to complete the challenge. Which, admittedly, didn't give you a lot of time. Matt was on his guard every time you opened your mouth, which meant you'd have to be strategic about this, if you wanted to win.
Rule Number Three: The lie had to be delivered in heartbeat earshot. That meant you couldn't lie to him through text messages or a long distance phone call.
Rule Number Four: If Matt falsely accused you of lying more than twice, then you won. You argued this rule in as a safeguard; otherwise, he could call out your lies on whims without any consequences.
And, finally, Rule Number Five: A lie had an expiration on it of ten seconds. If Matt didn't name the lie within ten seconds of you delivering it, then you won. You had even argued for more time, but it was Matt who had told you, with a particularly cocky wave of his hand, that he'd sense it within that time.
Several times you had tried lying to him since the start of the challenge. Each time, he'd sniffed it out immediately — almost instinctively, even — so that it was almost embarrassing at how readable you were.
"You heading out tonight for patrol?" you asked him when you emerged from the shower that night, wearing only a tee of Matt's and a towel around your head.
"Only for a bit. I've got to catch up on some paperwork this evening."
"Anything I can help with?"
"No, it's just prep for my opening next Wednesday." Matt tilted back in his chair, stretching with a restlessness that told you he'd much prefer to be out on the rooftops than reading through paperwork.
"Well, let me know if there's anything I can do," you said, and then added the lie: "I'll go do some reading, then."
Matt didn't hesitate. "What're you really going to be doing?"
You scrunched your nose at him, irritated. "And I thought I was so nonchalant. My heart is a traitor. Slow down, you." You slapped at your upper chest and lied again. "I actually wanted to do some online shopping. I need a new pair of sunglasses."
"No, you don't."
You released a dramatic exhale. "Fine! I'm going to journal a bit."
Matt listened for a moment, and then nodded, clearly placated. "I'll come say bye before I head out."
And then you even thought that you might get him when he came back, because it was past two in the morning and he'd taken a faster shower than usual — an indication he was anxious to get to bed —but when he crawled under the covers, apparently he was still on guard.
"Come in closer," you whispered, half-asleep yourself despite your hope of lying to him. "I meant to stay up for you, but I fell asleep."
Which wasn't true, even though you did often stay up for him. Tonight you had slipped into bed and fell asleep almost as soon as your head hit the pillow.
But Matt caught it; his hand nudged at your arm to acknowledge the lie. "Even this late, you're still trying to win the bet?"
Loopholes in the rules were hard to find, you realized. Matt seemed to appreciate your attempts to bypass them the next day — in fact, the closest you came to successfully lying was that morning, when you had about thirty-two hours left in the challenge. You had left to pick up bread for breakfast, and had just stepped out onto the street when you put your plan into action and dialed Matt's number.
Because technically, here on the street, right below the apartment, Matt could still hear your heartbeat, if he sought it out. But you hoped that if you were talking with him over the phone, then he wouldn't pay attention, and that he'd be distracted by the background fuzz of the call.
"Hey," you said, walking slowly down the sidewalk; you didn't want to be accused of leaving the earshot radius. "I just got a text from Foggy. He asked if I could bring that book I was telling him about the other day to dinner tomorrow night. Is it still on my dresser or did I return it to the library? I can't remember."
It was a clever lie, you thought. You had told Foggy about the book, and he did text you about bringing it to dinner. You did, however, specifically remember leaving the book on the dresser and not bringing it to the library the other day. It wasn't violating Rule Number One, either, because the question you asked Matt pertained directly to the lie.
There was a brief noise on the other end of the line as Matt presumably cocked his head, sweeping his senses out for a book on your dresser. In your head, you counted down the time. Ten... nine... eight... seven... six...
"The thick one?"
"Yeah."
Four... three... two...
"Lie," he said suddenly, and you could hear the smile on his face. "Nice try. Almost got me on that one."
"Crap," you said, sighing and adjusting your jacket as you picked up the pace, crossing the street after taking a quick glance left and right.
"If the lie hadn't been about a book, I wouldn't have thought to listen to your heart," he continued. "You care too much about your books to not know whether you've returned one to the library or not."
"Crap," you said again, but this time it was because the convenience store was closed; you'd have to go a couple blocks further to the larger supermarket. "Matt, I'm going to take a few minutes longer. The store's not open until nine."
Matt was quiet for a moment. "If that was a lie, that doesn't count. I can't hear your heartbeat from here."
"Nope. It's the truth. Anything else you want me to pick up while I'm at the grocery store? Ibuprofen, Advil, ice packs?"
Matt answered, but you didn't hear; an idea was formulating in your mind. "Sorry?" you said after a moment, picking up your pace as rain began to fall.
"Just more tea, I think."
"On it. See you in a bit," you said, and hung up.
Rule Number Four, you realized, was your ticket to winning. If you could get Matt to call you out on a lie when you weren't lying — and if you could get him to do it three times — you'd win.
So, the trick was to get your heart rate going at precisely the right moment. You left the grocery store with bread, tea, and a large espresso from the café next door.
And, miraculously, it worked. You walked in, your heart already feeling a bit more spry since you downed much, much more caffeine in the span of five minutes than you typically had over the course of an entire day, announced to Matt that the grocery store had been strangely busy today, and—
"Lie," he said, almost without even paying attention.
"Ha!" you said triumphantly, setting the bread down on the counter. "Wrong, Murdock!"
His brow furrowed. "What?" You could see him reaching out with his senses now, seeking what his mistake was, and...
"Espresso," he said, so quietly and forlornly that you laughed. "Damn. Your heart is racing."
"Brilliant, right? The grocery store really was packed." You waved the bread at him. "I'm starving. Can we make French toast with this?"
"Yeah. And don't get too happy yet, sweetheart. You haven't won yet."
"And there's the key word: yet," you reminded him.
Matt was on guard after that, so you waited the rest of the day before trying again; too often, and each effort would be futile. You could tell he was listening with far more diligence every time you spoke, and while it was slightly unnerving knowing that your heart rate was under constant scrutiny, it was worth it. Matt felt threatened that you would win. Even if you didn't end up winning the bet, that gave you enough pleasure to make the entire game worthwhile no matter what happened.
Step Two was getting Matt to watch a horror movie. You were a bit limited in your options, since Netflix didn't have many scary movies with audio descriptions available, but you agreed on one eventually and started it only once the sun had set.
And you waited. Waited, with Matt's arm wrapped around you, watching the movie and letting yourself get absorbed in it, because you were relying on your own natural adrenal responses to secure you the next false lie through Rule Number Four.
Fortunately, it was actually terrifying, so it didn't take much effort for you to feel a chill genuinely running up your spine.
"A door slowly creaks open," the audio description narrated. "The bathroom mirror suddenly swivels open. Standing in the reflection is a dark figure."
You physically jumped — thank you, jump scare — and seized the opportunity as your heart beat doubtlessly spiked. "Matt, I found some fan fiction that people posted online about the Devil of Hell's Kitchen. And I read it. Every last bit."
Matt's confusion was so palpable that you had to bite back a laugh. He reached over for the remote and paused the movie, his head tilted. "This feels against the rules."
"And yet, it's not," you said, rubbing his arm. "So, was that a lie? Or not? I'll give you a solid ten seconds starting now to answer."
"You can't just say something insane at the very moment your heart rate jumps from a movie!"
"Tick, tock."
"I've said it before and I'll say it again — you'd make a good lawyer."
"Aw. Thank you. Five. Four. Three."
"Come on!"
"Two. One."
"Lie," he decided, his jaw tight. "And for your sake, I truly hope it's a lie, because there better not be people writing fan fiction about me—"
"Sadly, it's the truth, Matt. Both that people have written it and that... I've..." You trailed off at the look on Matt's face. "Uh, that I might've possibly glanced over some of it."
"Please tell me there's not much of it."
"Um... well, there's a fair amount. People are fascinated by real life vigilantes, I guess. If you wanted you could always sue them for defamation."
"Sue? Sue as Daredevil? Show up to court wearing the suit?"
"Better yet, hire Nelson and Murdock as your lawyers, and you can switch back and forth during the trial between your lawyer suit and Daredevil suit, playing both roles. It'd be hilarious, like a real-life Mrs. Doubtfire moment."
"You find all this so amusing, don't you?" Matt tipped you back, his hands against the back of the sofa and caging you in. Goosebumps pricked up your arms as you glanced at his forearms; he'd rolled up his sleeves, and you could see the toned muscle in the dim lighting.
"Not at all," you said, your voice a bit higher.
"Lie," he breathed out, and leaned in to kiss you.
The next day passed, with every hour sliding by and bringing you nearer to the end of the bet. Once again you didn't dare press your luck, and chose to instead act naturally. The following morning and midday passed without only one or two halfhearted attempts to lie. ("Matt, did you hear that Captain America is starting up his own jazz band and he's going to be doing a world tour?" "Yeah, I did, right after the news segment announcing Black Panther's new clothing line of lingerie that he's founded.")
The loophole of Rule Number Four, however, was proving to be no longer viable as your winning method. Matt caught on to every truth that was meant to make him accidentally call you out on lying. In desperation you even did fifty jumping jacks to raise your heart rate, to Matt's amusement, but he had somehow latched onto the subtle difference between a heart rate raised by the adrenaline of exertion as opposed to the adrenaline of a lie.
So — you'd have to brainstorm instead.
With only about an hour to go until the bet ended, you set your alarm on your phone to go off just three minutes shy of the actual forty-eight hour mark.
The only challenge now was making sure Matt didn't check his own watch between now and the alarm.
"Time's almost up," he said, with the audacity to smirk at you, catching your arm as you went by him towards the bedroom. "Where are you headed?"
"To get something presentable on for supper," you said, gesturing down at your outfit.
"Karen and Foggy wouldn't mind if you showed up wearing that."
"I love you, Matt, but I look like a clown right now. I wish you could see the color combinations I've got going on. Think blue raspberry slushie dumped on top of black raspberry ice cream."
"Well, if you're changing, then what should I wear?" he said, mockery edging his voice. "That plaid shirt you got me? A white top? Or a sweatshirt? Y'know, since I won't be wearing the Daredevil suit, of course."
"Don't speak too soon. We still have a few minutes left." The bet still had five minutes, in fact; but the alarm would go off on your phone in two minutes. On a sudden whim you wrapped your arms around him, loosely holding your hands together around his neck as though you were about to slow dance together. Matt's hands naturally went to your waist, fingers grazing your hip bones. "If, in the extremely unlikely case that I do lose, you should wear your loose-fitted button-down from your birthday last year."
"Is that too fancy?"
"I don't think so. I'll be wearing a sundress. It's casual enough."
Matt spun you around, backing you into the wall. His eyes were intense, unblinking. "I know you're trying to keep my attention off of you. It's not going to work. I know you too well."
"Maybe you know less about me than you think," you challenged him.
"I doubt it."
"You'd be surprised, Matt. I've got secrets and ways of keeping them."
"Want to play that game, love? Because I can play that game." He tilted up your chin with his left hand. "That mosquito bite on your neck is still itching you, even if you've resisted scratching at it. You've still got the taste of mint in the back of your throat from when you brushed your teeth a few hours ago." His hand left your chin and brushed at your temple. "You got dehydrated this morning and had a headache, but it's gone away now. And your blush is practically a heat lamp right now, getting hotter with every second."
"Point taken," you muttered, but Matt wasn't finished.
"Down here," he continued, his hand now trailing down to your lower arm, "there's a bit of residue from the jam you got on your forearm during breakfast."
"I washed it off!"
"And I can still smell it." Matt lightly let go of you. "I could continue, if you'd like."
And then — your phone buzzed out a loud jingle, jolting both of you simultaneously. You fumbled in your pocket for your phone, shutting off the alarm. "Shit."
"Time's up," Matt said, with far too much pleasure in his voice. "I'm looking forward to spending a day at the office with you. Maybe we go in on the weekend?"
"Saturday I'm free," you said, as casually as you could possibly muster. "On Sunday I'm visiting a friend."
Which was a complete lie.
And Matt...
Didn't notice.
"We'll go in early," he said. "I had to go in this weekend anyway to get work done."
"Mm," you said, counting down the ten seconds in your head. "And I'm assuming you wanted me to help organize the files so that you wouldn't have to go into the office alone this weekend? This was all a ploy to get some company?"
"Of course. What kind of weekend would it be if I didn't get to spend it with my favorite person?"
"Foggy will take offense to that."
"Well, maybe I'll invite him too. And Karen. We can have a whole work-weekend at Nelson and—"
"Yes!" you shouted, so loudly that Matt tensed, as though scanning the room for a threat. "Get your suit on, Matt!" Without waiting for his answer you strode to the closet and pulled out the familiar red suit and mask. "A certain swindled devil now needs to make his appearance at a certain dinner party tonight."
Matt's expression was baffled. "But I won."
"Check your watch."
His fingers immediately felt for his watch, and then his face dropped. "You set the alarm early."
"And then proceeded to successfully lie about visiting a friend on Sunday. Oh, I can't wait to see Karen and Foggy's reaction when you arrive on the fire escape, dressed to the vigilante nines—"
"I can't believe you."
"Me either," you admitted. "I was getting nervous towards the end."
"I can't believe you," Matt repeated. "You're going to pay, sweetheart. That was playing dirty."
"Enjoy your retribution sometime else," you told him, tossing the mask over. He caught it, plucking it from the air without turning his head in the slightest. "We've got a dinner party to go to."
And maybe you'd still go into the office that weekend to help him out, you decided, a bit of guilt still stirring inside you, because he did just want you to be there with him, keeping him company.
After all, having a lie detector for a boyfriend really wasn't so bad.
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