Part One:

 I was watching my step-sister as she laid out by the pool. She has no idea, but I switched my name with Donny's name in her phone. She started sending me some nude pics, and when I saw what I could have, I decided to go for it. I tell her I'm going to tell Step-Dad. I own her now.

Part Two:

I barge into my slut step-sister's room because she's been avoiding me. When I pull out the bag I found in her closet filled with designer brand clothes and tell her I know about her sugar step-daddy, she knows she's on the line again. As soon as I bring up Step-Dad, she knows she's getting fucked by me again.