Stepdad gets off his job early!!

Oh my God! I still live in my parents' house and I have to be pretty careful about what and how I satisfy myself. I actually thought that my stepdad was still at work. But that was probably not the case! The asshole watched me secretly as I got myself really horny with my dildo! And what does he do then? Just come to me without being ashamed and press his thick prengel in my face! How should I react please?!??