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.
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.