What do you call a beta to a Sissy?

“So the bet is that instead of a week, every game you win from now on you get one day off your chastity time. Any game you choose. But if you lose even once, you have to spend the rest of the night as a beta sub to my little twerp, as I do anything I want to the two of you. However, if you agree to this, you play till either you are completely free or you are our cuck for the night plus you’ll be in chastity however many days you have left... deal?”

That’s not the worst deal in the world. Yes you have to win multiple games in a row or suffer, but even one win would be a day less in chastity. Plus you get to pic the competition. The down side is being not only the sub to your sadistic friend, but beta sub, could end with a lot of potential humiliation