Take over my Gf's niece! She's always been mean, and it's finally time some justice is served (Roleplay)

My girlfriend's niece has always been kind of a bitch, constantly mocking people she thinks are beneath her, just because she's pretty. Well now that she's 18, I think it's finally time a bit of justice is served. Take her over for a week, or take her over forever! It's up to you!

(Looking for a good amount of smut and story in this rp, feel free to send a message and we can iron out details!)