I went back to my room and saw my step sister was masturbating right in my bed. I watched it a bit and then asked her why was she doing it here. She was surprised but still was very horny and wanted to have sex with her step brother... He tries to resist but she is just insatiable and wants to be fucked. She lets her step brother to touch her titties and then enjoys sucking his big cock. But this is not enough for her and she wants him to put his dick in her pussy and fuck her nicely. Step brother cannot resist for too long and cums inside her pussy pretty quickly. Step sister says that this is still not enough, she wants to cum, too. So, he continues to fuck her hard until his step sister has a wild orgasm. In the end, she says they definitely have to do it again sometime...