Check the Version 2: step-Mommy and step-son: a story about her big ass V2 My step-son comes into the living room to find me reading an article on my phone. I`m in a robe with thong panties underneath. He asks me what I`m reading. I tell him I`m reading some exercise articles to tighten my butt up a bit. I think it’s getting too big. He disagrees and I question him as to why he is looking at my butt. I tell him he shouldn’t be looking at his step-mother's butt. He keeps complimenting it and I can’t help but eventually feel flattered. I keep telling him I feel like it’s too big. He asked me to show it to him. I`m shocked by his question and say no at first. He keeps asking so I reluctantly agree. I stand up and turn around. I stand straight up with my legs closed and slowly pull the bottom of my robe up to expose the bottom of my buttcheeks. I ask him what he thinks and he continues to complement it. He then asks me to pull my robe up more because he can’t see my full ass. I pull it up exposing my entire ass in my thong still standing straight up with my legs closed. I stand there for a bit asking him how it looks. After a minute or so I drop the robe back over my ass and turn around. I notice a bulge in his pants and ask him about it. He says my butt really turned him on. I`m shocked but flattered and offer to help him take care of it. I tell him to get his cock out and I'll be right back. I return topless in heels with a pair of sexy panties and another thong. I model them for him. Strutting around, clenching my buttcheeks, squatting, bending over, etc. I know he wants to cum on it. I stand straight up with my legs closed and tell him to come wedge the tip of his cock between my asscheeks. I squeeze on good and hard and beg him to cum in his step-mommy's ass crack.