A Wife Caught

I couldn't believe what I was watching. As he stepped into the shower behind Jenny, I knew it was only a matter of seconds before she screamed. As soon as she felt his big hands on her body, she would scream out for me to help. Okay, maybe she didn't realize it just from his touch. He was stood behind her after all, and her eyes were closed. But she must have realized as his huge thick cock pressed against her.
There was no way she could mistake his enormous penis for my much more average offering. But she didn't scream or say anything, for that matter. But that wasn't the really strange part. No, the really strange part was I didn't say anything. I just stood there and watched as my wife got more and more turned on as another man touched her. We'd never spoken about this or agreed it. But now, as I watched her cheating on me for the first time, or at least I assume the first time, I didn't say anything at all.
I was frozen to the spot. Except that's not the really strange part, either. The really strange part is my cock was harder than it had ever been. This is how I caught my wife.