A week later Susan texts you to come over

A week later you're sitting at home watching TV by yourself (Lord knows what Emma has gotten herself up to), when Susan texts you asking if you're free to come over.

"I want you to fuck me with my boyfriend. He finally said OK. I've been begging all week."

You say you're game and she sends you her address and quickly get on your way over.

Shortly before you arrive she texts to clarify that her boyfriend DOES NOT KNOW that you and Susan already have fucked. "Please keep that our secret, John!" she texts and you agree.

Susan's boyfriend seems pretty uncomfortable when you arrive, but you and Susan try to ignore that. She greets you with a kiss on the lips that lingers for a long time. You can smell how excited she already is.

Susan introduces you to her boyfriend who is just wearing boxers and a t-shirt.

As the two of you are shaking hands, Susan says to you, "He's mostly excited because he gets to fuck me in the ass. I've never let him do that before despite years of begging."

Her boyfriend blushes at this, but you're not sure if it's because he's ashamed at how easily he's let his girlfriend turn into a slut for a piece of her ass or because he wasn't able to get into her ass prior to this.

"And don't worry, honey," she says to her boyfriend, "my ass is off limits to John." After a pause, she explains, "He's much too big for that!"

"How do you know," he asks confused.

"Oh, Emma told me..." Susan says. "That's the sort of thing we talk about when we're bored at work. And she told me they have an arrangement, which is why I knew our new friend here would be down for some fun."