We both looked at each other panicked and she pointed towards her closet so I sprinted over there grabbing my pajama bottoms and hiding in her closet....“Ava, was that you? Are you okay!?” Our concerned mom asked.“Yeah.” Ava said while still out of breath from her orgasm. “I am fine it was just a nightmare.”My heart was beating as I hid in the closest. I did my best to hold my breath and not give any evidence to my mom that her son was in his sisters room with no pants and a rock hard. She had firm strong thigh muscles and was riding me like a horse. After a few minutes she folded her knees and sat on my cock and put her hands on my chest and started to push her hips forwards and backwards and as she went backwards she would rotate her hips and grind more into me. My left hand was running on her smooth right thigh and my right hand found a way to her left breast and cupped it hard.She increased her speed and dug her nails into my chest and screamed loud ayeeee and fell on my. I can’t really say the taste was what I expected, but the fumes I was getting from her pussy drove me insane. Her panties, now soaked, rested at my chin. “Rob, would you like a blowjob, or just jump into the sex?” “Jess, I’m so fucking hard right now, lets just fuck.” After those words, she moved down, and mounted me. The feeling was the same, but the joy was better. I was fucking my step-mom, and all I could think about was what position to try next. The guilt or even shame of what I was doing. Her little thong was soaked. I pulled it to the side and pushed two fingers.“Yes,” she moaned. “I need to be touched.”“I think you need to wait,” I said. “The way I had to wait all day.”“You didn’t get yourself off when you got here?”“Why would I do that?” I asked. “When I have you?”“Then use me,” she said. “You know I’m yours. I proved it last night.”I unzipped her little white skirt at the hip. It slid down to the floor. Her Puerto Rican ass looked amazing with her tan lines in her little.