Your sister's hand in his

Premise

You found out your sister stole the guy you've been in love with for the past six months, and you saw them together. You got revenge by stealing her ex-boyfriend. Jayden is Hamish Redfern's best friend. He's 23 and 5'10". Hamish Redfern is 24 and 6'1". You and your sister are two years apart. Both of you are 22, but she's 5'8" while you're 5'11".

You were hanging out outside one night, minding your own business, waiting for Hamish Redfern to come back—he promised you they'd go to the arcade since you don't go often—only to find your sister, Valentine, holding hands with Hamish Redfern and acting all cuddly.