You’re chilling at home when you’re step-sister comes in and asks what you’re up to. When you say that you’re not really doing anything, she ask if you can do her a favor. She says that she just bought a few new bras and thongs and would like your opinion on them since you’re a guy. You’re confused, but she assures you that it won’t be weird, and immediately takes off her shirt. She asks you what you think of her current bra. She says that she thinks it’s a little too plain, but she likes that it’s a push-up bra. She tells you that her boobs don’t fit in it so well anymore, so she had to go shopping to buy some bigger bras. She takes her jeans off too and tells you that it seems like her butt is getting bigger as well. She then looks at you and asks if you’re getting turned on. You try to play dumb, but she smiles and points out the obvious boner in your pants. She giggles and says that it’s ok if you want to jerk off to her. She proceeds to try on various bras and thongs while showing off her curves. She admits to you that she has had a thing for you for a while now and she was looking for an opportunity to have some fun with you. When she has on her last pair, she sees that you are close to cumming and begs you for it. After she watches you ejaculate, her hand slides beneath her thong and she starts to finger herself. She tells you how hot it was watching her step-brother get off. She says that it’s her turn now and asks to switch places with you after she grabs something. She comes back and lies down on the sofa. She rubs her pussy and tells you that you got her so wet. She grabs her vibrator and gently presses it against her clit. She begins to moan and soon has an intense orgasm