You're on a trip with your sister, mutual friends, and your girlfriend. Everyone in the cabin is resting and your sister asks you to come into her room because she's scared. She randomly brings up a childhood memory of when you found dads porn magazines and tried to reenact the pictures with your sister. Something you had hoped she didn't remember. She explains that she doesn't think the kissing, licking, and touching of each others parts back then counts as In**st. She googles and reads the definition to prove it. But...she wants to do stuff with you again. Even if it is In**st and in the big tee shirt and cute pink panties she keeps flashing, you can't resist your sister. Even when your girlfriend starts knocking on the door as your creampie her.