Sexual fantasy I want to have sex with a woman. I want to feel her tits bounce as she is grinding her wet pussy on mine. I want to make her moan out my name

I’m the smallest dick my wife’s ever had, This is really affecting my mind. My wife was talking with her friends, they had a girls night at our house and they were drinking on the patio. I was watching TV inside. When it would go to commercial or there was a low point in the sound I could hear them talking but otherwise they were out of my earshot. It was about 10:30, I went to the bathroom and paused the TV, and I could hear them well. They were talking about sex.