Stepmom is an Anal Whore

So I get home this afternoon and I hear some noise coming from my upstairs bedroom. It sounds like moans. When I go check it out my stepmother is on my bed masturbating to some porn on my laptop! What the fuck?! I always knew she was hot. But had no idea how much. After she caught me looking she invited me into the room and told me that my dad doesn't fuck her in the ass and if I would to do her the favor. I don't have much experience doing anal but who better to teach you than your hot stepmom. I didn't know my stepmom was such an anal whore.