I [M] made my married neighbor [F] cum at the gym.

This happened a few months back. I generally work out at very late hours of the night. It being an apartment gym and not a commercial gym, there's hardly ever anyone at those hours. Most days I worked out alone- and on some days I was joined by this woman. She was in her 30s, fairly fit and attractive- she mentioned she had two kids and a husband and this was the only time she got to herself after a long day.

Eventually we got to see more of each other, and we helped each other spot our workouts. One night after my workout I had brought my massage gun to my gym, and I was using it while I was in the locker room. She knocked on the locker room door and peeked inside before coming in (again- at this hour, there was no one there), and asked if she could borrow it after I was done.

She used the massage gun for a while on her triceps and shoulders, and I then saw her trying to reach for her back with the gun. I offered to help her and she handed it back to me. I proceeded to massage the length of her spine and her shoulder blades, and I heard her hum a moan. Eventually, she laid down on the bench and asked me to massage her glutes.

I started to massage her glutes and then ran the gun up and down her thighs over her yoga pants, and she gently hummed and told me to continue. Slowly as I massaged her inner thighs, she spread her legs just a little further, and her moans got more audible. As she spread her legs further, I edged closer and closer up her thighs, till the massager would touch her ass and pussy every time I moved it all the way.

I could see her bite on her lips as she turned around, facing front. She didn't say anything, but I continued to massage her inner thighs, gently edging on to her pussy. I saw her hands grip on to the bench each time I did, and soon enough, I set the vibrator on her pussy, on top of her clothes.

I saw her twitch and quiver as I held the vibrator on. Eventually after a few seconds, she pushed it away. I thought I had crossed a line but all she said was, "it's too strong.", as she lowered her yoga pants and panties to her thighs, and began to finger herself. I saw her fingers rub her bare pussy uncontrollably as she tilted her head back.

I took the massage gun and started to gently rub it on her nipples. She moaned so loud I was glad no one was around at this hour. I used my other hand to gently rub her warm and wet pussy, and she pulled her hands back. She then lifted her top and sports bra to let her beautiful tits out.

I gently rubbed and finger fucked her while running the massager on her nipples. I then had the idea to hold the "ball" of the massager, as I put my fingers into her pussy with my thumb on her clit. With my other hand, I pinched and pulled her nipples. Eventually, the massager fell out of my hands, and as I fingered her, her thighs gripped hard, her pussy clenched and I could feel her orgasm. She quivered and panted hard, and laid back down for a minute to catch her breath. She then got up with a stuttering "I guess- I will see you around", as she got up to leave.

After I came to my senses from the incredible thing that happened, I began to feel a bit guilty about it all, and anxious about what would happen next. However, this was the start of a whole few months of sexual tension between us that had some crazy moments.