A friend of mine was staying over at our house, and my wife had already gone to bed while he and I stayed up and drank more. The friend was talking about how hot he thought my wife was and how if she and I ever split, he would be all over her, trying to get in her pants. I told him he did not have to wait and that he could get in her pants if he wanted. He thought I was joking and pulled his jeans off to get ready to ...... on our sofa. He had a hard-on, and I told him to use the bathroom in our bedroom instead of the guest bathroom.
Since we had other guests ...... in our guest rooms, my wife was in her flannel pajamas on the bed. My friend walked into the room and stopped as my wife, still awake, asked, "are you in your underwear?"
He shyly said yes, and he was told to use our bathroom. My wife smiled and asked, "Do you have a boner?" My friend was well-hung, so there was no mistaking his state of arousal. He told my wife it was her flannel making him hard, and he said something to the effect of wishing he could take it off her.
I love this picture of my friend as he slowly pulled my wife's bottoms and panties off her, almost like he was afraid she would stop him.