I'd Fight The Devil
Alastor x fem! reader
Background: (Y/N) is the elder Morningstar, and wants to fix her relationship with her dad. But her dad hates her boyfriend.
Part 1, Part 2, Part 3 - Finale
Allusions to sex, actual sex, angel being angel, and cannibalism
_____
Angel spit out his drink, "You're with Alastor?!"
"Yeah, thoughts?"
"And prayers, girl," Angel could never imagine a sweet girl like (Y/N) getting it on with the Radio Demon himself.
But everyone has their kinks, he supposed.
Alastor manifested behind her, and she immediately felt his presence. Pressing herself against him, he leaned into her warmth and kept his arms around her shoulders.
"How was your day, mon amour?"
"It'll be even better," She trailed off, turning around to face him, "when we meet my dad for dinner."
Silence.
And not even radio silence.
"Not to be rash, but I'm sure your father would sooner see my head on a pike than on my body," Alastor adored the fact that she was mending their bond, even more so when Lucifer makes the effort.
But announcing their relationship to him?
He could see it ending in flames.
"I know you two don't get along, but I thought a nice dinner might smooth things over."
"And if he disapproves of us?" He lifted her head upwards with his finger, bemused as to what her answer may be.
"Then he'll have to get used to it," (Y/N) replied, sending a shiver of excitement up his spine.
Only a feeling that the she-devil he was utterly obsessed with could provide.
"Ugh, can you guys go fuck somewhere else?" Angel said, "or at all? I can't imagine going a lifetime without dick."
Alastors eye twitch, "now that's our business, isn't it?"
"Okay, okay," Charlie spoke up, "you guys go get ready."
Charlie couldn't help but notice the change in Alastor. It had only been a few months, but being in her sisters presence alone has made him kind. Sure, the both of them would skin someone alive over an insult, but Alastor would rip out his own eyes if (Y/N) asked.
A perfect match.
(Y/N) dawned a black dress with a pearl necklace that Alastor bought for her. Well, she thinks he bought it but he actually stole it off of a fresh kill.
How sweet.
"Pumpkin! Oh look at you! You're as radiant as ever!" Lucifer fawned over his daughter as they made it to the restaurant, making it a point to ignore the red demon behind her.
"Catching strays?" Lucifer gestured to him.
"Lovely to see you again," Alastor retorted.
"Dad, why don't we go inside? And Alastor will be joining us," now, Lucifer didn't forget what he said. He recognized that the fearsome deer demon had the intention of claiming Princess (Y/N) as his own, but did his daughter return such feelings?
Honestly, Lucifer feared that.
Not it being Alastor persay, but his little girls being hurt.
He knew how awful it felt to go through the divorce with Lilith, and then her disappearance.
He didn't ever want his daughters to feel that way.
"So, Alastor, what do you do again?"
"I have a radio broadcast. Your daughter has actually helped me repair the studio after the attack," He laid his land on hers.
And Lucifer picked up Alastors hand.
And placed it away from hers.
"Uh, dad-"
"Look, if you two are fucking, don't tell me."
"Dad!" Her face burned red, "we aren't-that's not. . .I love Alastor, and he loves me. I want you to accept us both."
"Love? Whoa, whoa, whoa! Pumpkin, I don't think-"
"I'm not a little kid," She interrupted, "I'm a grown woman, and I'm able to make my own decisions. I want to be with Alastor because I love him. You may not think I know what love is, but I know it's what I feel with Alastor."
That's when he saw it.
That look.
Whilst (Y/N) was defending herself, defending their love, Alastor looked at her. Only her. And it was like he was staring at the nebula itself, seeing all its beauty in the Heir of Hell. His smile faltered, closing his mouth, and his eyes softened.
It's the same look that he used to give Lilith.
"If I ever hear that you've made her cry, or even laid a single hand upon her," Lucifer stared him down, "I'll make you disappear."
"A man true to his word. Looks like we have something in common," Alastor agreed, his hand back on hers. She gave him a smile, one that reminded him of Lilith.
The rest of dinner went off without any incidents. The small jab here and there, but no one died, and no one was stabbed. Lucifer learned more about his daughters business and how she lit up talking about it.
"You hardly ate, Alastor. Is something wrong?" (Y/N) asked when her father went to the restroom.
"Oh no, my dear. Just hungry for something else, is all," His eyes raked up her form, earning a cough from the she-devil.
Honestly, she didn't know where he was on his spectrum. She was fine never even being intimate, so long as he was happy, but this spark in his eyes lit a fire within her.
"O-oh. . .are you sure?" Believe it or not, (Y/N) had only had sex twice and both times she'd call it lackluster.
"I don't want you to force yourself if you don't want to," oh how innocent she was. Honestly, Alastor assumed he was aroace before he met the she-devil. Her ferocity - her chaos in fights, her genuine kindness, and her soul - itself brought out that spark.
There are moments where the carnal desire needs to be satisfied.
"Mon cher, I'd never ask if I didn't mean it."
That look, it made her softly gasp.
"Alast-"
"Ew."
Right.
Lucifer.
He showed up from his restroom break and found the pair giving eachother "fuck me" eyes.
"Could I eat my dinner without you groping my child?" Lucifer hissed, despite Alastor only touching her hand.
He blinked, thinking how he's never even groped a woman.
"Maybe."
Sick bastard.
_ _ _ ☆ _ _ _
"Fuck! Alastor!"
(Y/N) had never cum before, so Alastor being her first to ever do so and smiling away at her quivering legs made it so much better.
"Oh fuck. . ." She moaned weakly, his tongue slithering in and out of her to lick up every last drop.
"Al. . ." She was breathless, staring at his strained member. Reaching up to unzip his pants, he tutted as he grabbed her wrist.
"Al?"
"It's about you. Don't worry about me, amour," He purred, kissing the bite marks on her thighs.
"But you-"
Before she could detest further, wishing to satisfy him, the door opened.
"Oh my God, they were right! Alastor, you sly dog," Angel Dust was at the door, and Alastor quickly covered his beloveds' body with the covers before his horns started to grow and his back stretched.
"I'm going to kill you."
"Not before you make love to me, you're not," still in his demonic form, (Y/N) blew a gust of wind to slam the door shut.
Her body displayed on the bed, Alastor agreed.
"And stay in that form. It suits you."
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