I kind of felt like it on this morning but I decided to wait until later on in the day. I opened my bedroom door and could hear moaning coming from do...n the hallway. I knew that only my mom was home and thought she might be hurt or something. I walked down the hall in my boxers really quietly, because I wasn’t sure what was going on, and when I got to my folk’s bedroom, the door was not closed all the way, so I put my eye to the crack of the door to look in and find out what the moaning was all. He was in his swimming shorts, I was in my bikini bottoms and had pulled a white crop-top over my bare titties (what little I had at that time. I had been topless sun-bathing all week).I don't know why I started it but I started messing and squirted water from my water bottle at my step-dad. His response was the nuclear option of soaking me with a whole bottle; my top, of course, went totally see-through.Somehow, I ended up sitting on his lap getting tickled. I was giggling uncontrollably and. She was leaning against the wall while she masturbated while watching us fuck. "Vicki, how could you do this with my son?" Mom croaked. It looks like I did what you've always wanted to, based on your reaction, or are you masturbating for some other reason?" moaned Vicki. Mom lurched over to the table and reached out to touch us. "I've got to feel this, I'm so turned on!" Vicki groaned loudly as I continued to stroke my cock in and out of her pussy. “Ooooh, he’s so hard and he’s fucking me so. This time I closed my eyes, too. ‘Zack, you’re wonderful.’ ‘So are you.’ With his other hand, he grabbed the collar of my shirt and pulled gently. I moved with him until I was bent over. We stared at each other’s lips and leaned in close. When our mouths finally met, we didn’t want to let go. He moved over a little on the semi-large bed and I sat down beside him. Then, I laid sideways, facing him. I rubbed his shoulders and upper arm. I imagined all the times he must’ve used his arms to pull.