’ Joan gripped and squeezed his butt muscles through his shorts. She took off his sneakers and rolled his toes and arches. Spence felt the cramps ea...e somewhat. ‘That’s a little better’ he said. Joan worked Spence’s legs some more. She had him sit on the bench with his legs flat out in front. She sat behind him, mashing her mounds into his back, as she helped him lean forward into a stretch. Spence maintained that position for a long time, feeling the pleasant softness mold against him. She has a couple of kids and has to earn a living because hubby is always drunk. Out talking continued while she worked. She got very friendly and lost all her shyness.Finally I decided to make my move. I told her that i had just come back from the gym and my back hurt and whether she knew where my SIL kept the massage oil. She got the oil and said “Should I massage your back?” That was just what I was hoping for. I asked her whether I could take off my shirt. She said ok. I slept on my tummy. By this time I wasn’t going through any other foreplay and I think my sister knew it, as I mounted her, pushing my cock into her.I started pushing myself into her as far as I could go, and again bottoming out, on touching her cervix. Maggie had wrapped her legs around me. We started grinding our hips together, it was then I heard my bed creak and wondered if mum or dad could hear us. But that thought only lasted fleetingly and I kept grinding my cock into Maggie. By now our hips were coming. "Ok Billy, go slow but smooth all they way in."Billy's hips moved with a natural smooth motion as he buried his fully erect dick balls deep into his mother's pink pussy for the first time.The feeling for both Cheryl and Billy was like nothing either had ever felt before.Billy, instinctively, began to fuck his mother with smooth, fluid and rhythmic hip motion. Backing almost all the way out and then thrusting with authority all the way in, giving Cheryl the experience of the entirety of his sex.