My son brought his girlfriend over often, and that's how I met her. She was really nice, and she always helped me around the house and with things I needed, so we became close, and I liked her.

He kept bringing her to our house, and since our walls aren't very thick, I could hear every time they fucked. His girlfriend told me that one of my son's dreams is to fuck both her and me at the same time, but he is too shy to ask for it. A few times, I talked to her about what they do together.

So I thought that the next time they fucked, I should slowly knock on the door. I told her this ahead of time so that it would look like an accident when I knock and enter like it's an emergency. She was moaning a few times before I walked into their room and saw my son fucking her in cowgirl. She told me to join them. My son's eyes lit up so much, like he had been waiting for this his whole life. I was wearing some sexy house clothes with cleavage.

I licked her pussy while he took it out of her, and then I just sucked his cock. It wasn't much, and we didn't really get to fuck. I was more of a helper.

They've told me to join them every time since, so I think they liked it. I'm still waiting for the day he will fuck me, but I don't want to push it.