I had only been home from college for a couple of weeks when I decided to stop by Sandy's to see if she was around. Her mom answered the door wearing her tennis outfit, which showed off her shapely, tan legs. She was a petite woman with a definite tennis player physique and short brown hair. It was obvious where Sandy got her good looks. After telling me that Sandy wasn't home, she commented that she wouldn't have thought it possible, but that she believed my voice had gotten deeper and my shoulders broader since the last time she saw me. I'd been getting comments on my deep voice ever since it had changed in middle school and although I didn't think my shoulders were particularly broad, it wasn't the first time I'd received such a compliment. She asked what I was up to for the summer and I told her that I was building houses and that my broad shoulders were already killing me from the demanding work.
When she invited me in, saying that she had some time and knew just the thing to help loosen me up, I assumed she was talking about a shoulder massage. When she confirmed that was what she meant, but suggested we do it in her bedroom in case Sandy came home, so things wouldn't be awkward, I still didn't jump to the conclusion that she wanted to jump me. She was a grown woman, not one of the college girls I was used to, so to her a massage might still just mean a massage. Either way, just having her hands on my shoulders would be a pleasure, even if it came to nothing else.
She had me take my shirt off and lie facedown on her bed, but she was behind me, so I couldn't read anything from her facial expression or body language. As I lay on my stomach, she climbed onto the bed and straddled my ass, her soft, warm hands soon contacting the bare skin of my back. To be nineteen and have an older woman sitting on my back rubbing my shoulders was definitely a fantasy come true and I didn't want to blow it by putting some cheesy move on her. I got the sense that I didn't need to anyway when she suggested that I turn over onto my back so she could continue to work my shoulders from the front.
She raised herself up and I rolled over, hoping that she wouldn't look down to see that my shorts were tented out slightly. When she settled herself down right on my growing member and it immediately began growing more quickly, I knew that there was no way that she couldn't feel it. As she started rubbing my shoulders and upper pectorals, I noticed that her nipples were pressing out against her top. I also realized that she was starting to rock against my growing member, resulting in continued and even more rapid growth.
After a few minutes I had already decided that cumming in my shorts would be just fine, but apparently Sandy's mom had other plans. She lifted herself off my rigid tool while reaching down to unfasten and open my shorts, then pulled my tool out. I watched her hands as she stroked my tool in one while the other pulled her panties aside, exposing a trim, light brown bush. She immediately guided the head of my tool to her pussy, rubbing it between her lips before starting to lower herself onto it. I was, to put it mildly, in shock. She started slowly riding up and down on my cock while I just lay there in disbelief. She was holding her short tennis skirt up against her stomach with one hand while the fingertips of her other hand held her panties aside and gently massaged her clit as she rode me.
Finally realizing that I wanted to be a participant and not just a spectator, I first moved my hands up onto her smooth thighs and slid them up and down while beginning to raise my ass up off the bed slightly as well. My eyes were drawn up from her pussy to her hard nipples still pressing out against her top, so I slid my hands up under her top. I fondled her small tits through her sports bra briefly before pushing the bottom up and sliding my hands over her bare tits. Her small mounds were soft and smooth except for her hard nipples brushing against my palms. She seemed to be gradually moving faster as she rode me, so I played with her tits until she started getting noisy. It sounded as though she was approaching an orgasm, so I ran my hands around to her firm, muscular ass and pulled her down harder on my cock while pushing up deeper into her at the same time.