It was a Wednesday afternoon that I came home early from work. My best friend and water skiing buddy, Merv was laying tiles in our bathroom at that time so I was not concerned when his car was parked in the driveway. I parked on the road and walked up the driveway to the house. I could hear no noise in the house which was unusual as my wife usually listened to music during the afternoon. I knew that she was home because I could see her car was in the garage. Because it seemed so unusually quiet, I entered making as little noise as possible.

I walked down the hall way and the door to the bathroom was open so I peeked around the corner. My wife, Sue was sitting on the edge of the vanity facing slightly away from where I was and our friend was on his knees licking her pussy. Merv then stood up with his cock in his hand and rubbed the head of his cock up and down her slit, then entered her. She responded by wrapping her legs around his waist while leaning as far back as she could to give him better access.

Initially my feelings were mixed between anger and wanting to know what would happen. I have had a vasectomy and I knew that my wife at that time was not on the pill but there appeared to be no attempt to use any protection.

As I watched, my anger was starting to take over. Because I didn't want to start a fight I turned around and left the house, slamming the door as I went. I then got on my bike making a good deal of noise in the process and left.

I returned later that night entered the house and found my wife in bed. Our friend had left.

I got into bed behind her but facing her back and found that she was nude. I was still sexually excited from what I had seen but most of my anger had dissipated by this time. My cock was pushing up against her back. She moved her body so that my cock slipped between her legs after which she started to move back and forth so that my cock was slipping across her slit. She was extremely wet and visions of Merv’s cock teasing her pussy followed by a flash vision of her pussy filled with his sperm possibly fertilizing her eggs entered my mind. She moved so that I slipped into her.

She was very loose and slimy and so I immediately knew that he had finished inside her. I wondered how many times they had done it and also whether this had been the first time. My brief sight of his cock showed me that he was quite a bit thicker than me. This explained why she was so loose to my thinner but perhaps slightly longer cock. It didn't take me long to cum. Normally, I can hold back, but on this occasion I found this was not possible.

She then rolled over, kissed me and said, "I'm sorry honey but when I was watching him working I could see his bulge in his shorts. This was getting me horny so when he took me in his arms and kissed me I just couldn't resist. Merv and his wife have been fighting endlessly recently and he has been confiding in me about how they haven't had sex in months. He told me that it is driving him insane. How could I not help him out? He is our best friend."

By this time I was getting horny again so I reached down and started rubbing her wet hole. I threw the blankets back rolled her onto her belly and entered her from behind again. Before I entered her I got a good look at her pussy and it was red, swollen and gaping open with sperm visible inside her. The sperm was possibly mine but the picture in my mind was that it was his.

She was so loose that I made her close her legs to give me the friction that was required to feel her.

"How many times did he do you? You’re so loose I can't feel a thing."

"Well, when you left we knew you wouldn't be back in a hurry so we moved into the spare bedroom. It was so long since he had sex that he went three times in a row over about an hour and a half."

"You didn't use protection?"

"We didn't plan it. It just happened and neither of us were prepared."

"He could have pulled out."

"You know me. I love my sex and I would never ask a man to pull out at the most important moment. Besides I wanted him to do it in me. I came at the same time as him and I was not going to let him pull out. You know what I'm like when that happens with me."

This put me over the top again.

It would have been better for both of us if she discussed things with me but with the exception of a couple of minor things she kept me in the dark which makes me think that when I caught her and Merv it probably was not the first time.

As the years went by there were other things that I witnessed and occasionally she would drop a hint that there was someone else and on other occasions I could tell that I was not the first that day. Eventually I was to tell her that I knew that she was cheating on me and she did not try to deny it. There was not much that I could do about it other than leave and I cared about her too much for that.