You (as a one-time thing)

"I actually meant your strapon," Ashley says, "...but, I suppose I'm willing to try one cock. You know, to see if I like it at all."

"That's the spirit," Casey says, "No commitment- just cock."

You wonder if your wish to make them want you to join them expanded to coerce Ashley or if she did it on her own. You didn't explicitly say it, so it could just be her own desires coming to the surface.

As you resume fucking Casey properly, you see some nonverbal communication between the couple...

Ashley slides down a bit and starts kissing her girlfriend. Her hands roam up to her breasts and start to play with them

To aid the pair, you reach down and start to rub the outside of her pussy. You find her clit and start to work on it.

After mere moments of the triple stimulation (not to mention lots of fucking), Casey cums!

Her arms give out and she flattens against her girlfriend's body on the couch. Their breasts press together and their eyes stay locked as one of them cums.

You resist cumming in her pussy, but it sure isn't easy!

"If it is that good, I may consider more guys in our bedroom," Ashley says, kissing Casey.

"You'll love it. Just don't think of replacing me."

"Never, Case. So I get to pick the position for my first right?"

"Of course," Casey says, "Do you want him to do you like I usually do?"

"Maybe. I think I'd like to do him..."