Simon curtis?

That's called cucking
No cucking is when they enjoy the humiliation of their significant other fucking someone else in front of them, the cuckold isn't really offering or in control in this dynamic but the humiliated party, the significant other is the one making a power play. What I meant is when a dom/master has this sort of "ownership" over his sub and basically whores him out and passes him around like a pimp. The power dynamics are flipped and the subjugation of the sub to his dom to the point where the dom decides who he gets fucked by is what turns them on in this scenario.