Yes

Again Sarah is hard, but there is little she can do shy of **** me to get me to have sex at this time. I snuggle into the bed. It seems for a moment that she is considering the more forceful option but she stops. "Okay, I am beat. I was raised well. I am a guest in your home and you have been more than welcoming. In fact the most welcoming host I have ever known. I will let you sleep on three conditions."

Wearily I said, "Sure, what are they?"

She got up and moved to my face and counted out her demands in front of me. "First, you will sleep the whole night with that dildo, firmly in your bottom. Second, you will allow me to rub myself to sleep against your ass tonight and not complain if I cum on you, otherwise I will have sexual frustration. And three, you promise that I will get to fuck you in your ass tomorrow." She seemed triumphant in her demands. Croakily and tired, I responded, though not without my own demand. "Okay to number one, I can do that. To number two, I can accept that, I do not want you to be frustrated, but I am surprised with just how much you can fuck in one day. And to condition three, I agree, but only if in return I can also have a go in your ass too."

She did not expect my condition. It took her a moment. "Addendum, you may fuck me in my ass, if you can stop yourself from cumming while I fuck you. In fact, if you don't cum while I am fucking you, without touching your dick, I will let you penetrate my ass with your cock. Does that sound fair?"

It sounded like she was very confident with herself, like she expected to win. "And if I do cum from just your cock?"

"Then you will be my cock slut until your wife comes back. Then we will see."

"Okay, it is agreed."