it doesn't make any sense to me. it sounds like the mc was 'seeking revenge' by rewarding them.
oldboy kinda has this situation with dad & daughter. it kinda works because it's not meant as porn, but the second you cross that line the plot loses point. I mean imagine if in the movie the dad found out he liked fucking his daughter? it instantly makes the whole convoluted 20 year revenge plot 20 years of wasted effort. it only works because the mc hates that it happened.
and if you make it about cucking, you lose the motivation for seeking revenge. why would he want revenge for something he loves?
it makes no sense either way.