#and Clarke knew she was going to marry Lexa so she didnt want to form a connection that went too far with Finn :)

[lexa-griffins]

Wait based on your ask, are they each other's firsts in the act of falling in love?

Yes! Lexa was implied, she loved Clarke since she was around six years old and after they got engaged at only fourteen she didn't have eyes for anyone else and as an omega in this type of society, her being a virgin was "mandatory".

Clarke is explicitly mentioned, because Lexa thought for sure her and Finn had done something:

"I am afraid I’ll hurt you. Lexa, I have never...” The words die in her mouth and Lexa feels her heart thump loudly.

She assumed Clarke had, at some point, shared intimacy with the beta she loved. It was not uncommon for alphas to gain experience with betas before they were to be married. It was encouraged even, a ritual of passage most partook in with delight.

Lexa is ashamed of the feeling of euphoria that runs through her body. No matter her feelings towards the omega she was to marry, Clarke had respected Lexa’s wishful request. She never expected her to. They had been young when they spoke about it, newly engaged as Lexa tentatively asked Clarke if she would save herself for their wedding night. It had been before Finn, before Clarke had grown more into her alphahood, before Lexa came to terms with not being loved back by her bride to be. The girl had agreed with a smile, that charming smile, filling Lexa with trust.

:)