You can’t resist

Aside from Master’s, you’d never seen a cock so perfect. You take it into your mouth without relenting one bit in your thrusting. It feels as smooth on your tongue as it looks. Deciding to try and turn it into a race, you give it your all to suck him off well and see who can cum first. As you go down on him you can see he has an identical plug in his ass, shiny metal with Master’s initials engraved.

Alec starts to moan and squirm underneath you as you use every trick you’ve been taught by Master to make him cum, but in the end it’s you who loses your personal contest, and empty your second load of the night into his mouth. You whimper a bit at not being able to make either of them orgasm.

“Done already Ace? That’s so unlike you. Oh, you’re wondering why they didn’t cum? That’s simple, I trained them not to unless they have my permission. It took a long time, with many orgasms and many more punishments, but now neither of them are physically capable of it unless they have my say so. And unless they are very good for you tonight, they do not have my permission. You do though, so keep going as many times as you like.”

This made sense to you, and was reassuring. You did wonder though, you’d just cum twice in under 10 minutes and didn’t even feel tired, which is unusual for you.

“You may also notice that you haven’t gotten any less horny. That’s my doing. I slipped something I’ve been working on into your dinner before we left. you have 12 hours of unlimited sexual stamina, but may need to sleep for a couple days when you’re done.” He chuckled

Despite the revelation of being **** with an experimental substance without your knowledge, you felt great. Looking around, you searched for your next conquest. Emily was still busy on Master’s cock. You could try to fuck her again, but didn’t know if Master would approve since he was still using her. Alec was recovering on the floor, and probably wouldn’t be useful for at least 15 more minutes. Master did mention other people in the house though…