It's summer and it's hot as hell. Your step-sister is wandering around the house looking at her cell phone, wearing a crop top and shorts, letting her soft belly peek out slightly. How can you not stare at her? "hey, stop staring at me!!!" Among her many talents, there is certainly no kindness to you. She does not like you at all, and it is well understood by the way she intimates you not to talk to her and get out of her way!  "Just because we're our parents are married doesn't mean we're friends. And living in the same house is just a coincidence." You still can't hold back your gaze, however, which falls back on her belly again... and she finally notices everything.  "oh. I should have known. You're one of those, aren't you? I knew you were a weirdo... what a loser!"  You adamantly deny it, but by now you've been found out. She approaches you with her prominent belly, sadisticly tempting you!  "from now on you'll be my slave... you'll do whatever I want. Well, what do you expect from me?? if we were in one of the pornos you see now I'd let you masturbate on my belly, wouldn't I? but this is reality, loser!! don't you dare touch yourself in front of me!!!" But touching your cock is unnecessary. In fact, you reach orgasm without even the need to lay a finger on your cock, while she continues to humiliate you... how embarrassing! She's shocked and to ensure your total loyalty, she even takes pictures of you. It's going to be a long summer!