You and your cousin played doctor and it went too far. You haven't seen her in 5 years. Now you're returning to spend two weeks alone with her.
Your teasing cousin welcomes you home after you've been out late at night for some reason. (Yes, this is loosely based off the cousin from Bible Black)
[9 SCENARIOS] Your cousin (and your roommates) loves deepthroat. No, like, she's obsessed with it. She wants to choke on your cock for almost 24/7. Just accept it.