Had never cheated before but use to flirt with his college friends often for fun. One night there was a bunch of us in the hot tub hanging out after drinking all day and night. My husband (bf at the time) was next to me and the rest were his and my friends. We were all talking and laughing like normal, the jets were on and its normal to touch other feet in a crowded tub. I kept accidentally touching his best friends foot and would pull back quickly. But then his friend purposley would go after my feet and started playing footsies with me under the jets all while acting normal above water. After doing that a bit he slid a little closer to my seat and his hand started wandering on my thigh, it was very surprising at first but so hot since my bf was on the other side of me. I kept a straight face and continued the conversation as he untied my bottoms. He teased my thighs and I opened my legs so he could play with my pussy. I remember looking at my bf and smiling, he had no idea. It was so bad and so hot at the same time. His friend rubbed my clit as he joked with his friends. Slowly people started getting out one by one to end the night and go to bed. My boyfriend asked if i was coming when he got out, it made me laugh but i said no i wanted to relax in the quiet a bit longer and id meet him in bed. He didnt think anything of it when he left me and his best friend behind as the last two.

Once everyone was inside, it was quiet, the lights were off, my pussy was so wet. I looked at him like a possessed sex addict and pounced on him. His dick was already out under the water, i jumped on it immediately and grinded on him with my tits in his face. He ripped my bikini top off and sucked on my tits as i rode him. Water isnt a great lubricant so he bent me over the side of the tub and fucked me from behind, i came so fast. He finished, we looked at each other and laughed as if we just had the craziest fever dream. Dried off and went to our separate rooms. We never talked about it again after that, just sneaky smiles on occasion.

I eventually told my husband many years later after we were married, it turned him on so much but he said he was mad we excluded him.