When I gathered myself, I looked back over at the scene on the bed. The pace had picked up and mom was now leaned over the younger womans back bouncing her hips up and down. With this new angle, I could now see the strap on as it thrusted in an out of the stranger's vagina. It was so realistic looking. The large plastic dick must have been at least 9 inches long. The dark tan color blended perfectly with my mother's skin. It was destroying this poor girl's vagina and she was loving it. I felt my penis getting hard again. I did not want to risk getting caught so I closed the door and ran back to my room to jerk off before falling asleep.
About two months have passed since that night, since then the late-night visits became more frequent. It was starting to become a nightly routine. I had not spied on my mother since that first night, however, I would masturbate to the sounds of her lovemaking, and I always thought back to the images from that night. I would picture my mother's tight round ass and her muscular back. I thought about seeing her thrust her massive strap on into that woman's pussy. I would imagine that it was me she was shoving her big dick into. It drove me crazy, and I would always have an intense orgasm.
After dozens of nights masturbating to the sounds of her late-night escapades, I decided I needed to see it again. I crept out of bed. Already naked and hard from the sounds I heard echoing through the house. I quietly slipped down the hall. As I got closer to the living room the moans grew much louder. I peeked around the corner and was shocked.
To my surprise, my mother and her lover were on the sofa. My mother was sitting down, and the sexy stranger was grinding on her in the cowgirl position. This was my first time seeing the mysterious woman clearly. Her silky black hair stretched down to her waist. Her tits were perky but not big. C cup was my guess. Her pink nipples were pierced with silver nipple bars. My mother's hands squeezed tightly around her plump ass. She was wearing red lipstick which contrasted well with her innocent face. Seeing her perfect pale body grind on my mother made my dick throb.
I started stroking my cock. After a few minutes of edging, I couldn't hold it any longer. I shot a massive load of semen across the floor. I was so lost in my orgasm I didn't even notice my mother's lover staring at me. When I finally gained my composure, we made eye contact. She began to moan loudly as she wrapped her arms around my mother's neck embracing her in a hug as she orgasmed. We never broke eye contact. As her orgasm faded, she gave me an evil grin. I ran back to my room petrified. I laid in bed for hours thinking about the consequences of what just happened. Wondering if she was going to tell my mother about me spying on them. The sounds of sex continued through the night so obviously she had not said anything yet. I finally pushed all of these thoughts out of my mind and was able to fall asleep. I had no idea that what happened that night would change my life forever.