D: ..he joins us?

Your girlfriend pauses.

"You want that. Steven should... my son should..."

You've really put her off track. She didn't expect such an answer from you.

"You mean you want to have something like a threesome? But I can't have sex with my own.."

"...No no, I don't mean it like that," you interrupt Janice.

"I don't want him to sleep with us, I just want him to be there."

"But why?"

"I want him to see that sex between two lovers is a natural thing. And once he watches us and the ice is broken, then it won't be a problem if we make love in the living room or kitchen and he comes in. I want a normal sex life with you, you know?"

Janice pondered. This was a lot for her.

"I don't know honey..." she said.

"We'll start slow. First, we'll leave the bedroom door all the way open during sex. Then when he passes our room, he can come in and if he doesn't want to see it, he'll just keep walking. Later we do it all the way open in the living room on the couch and later also just before breakfast in the kitchen. Sometimes Steven sees us, sometimes he doesn't. "

"It's not like we have to hide..." says Janice quietly.

"Exactly! And eventually, after maybe two or three weeks, we'll do it in his room, too. Without him and with him in it."

"You want that...we go in his room while he's studying or playing and then make love in his bed?"

"Exactly."

Janice is also now gripped by the idea of fucking in her son's bed with his best friend. With you. But she is still hesitant. Which is understandable, so you want to slowly make it appealing to her.