It sounds like this was born out some marital issues....who's idea was this as the solution ? Was this the best idea ? What were the ideas that got rejected ?
Is Wifely duty code for sex? How much was expected....how much different was your desire for sex.?
Also it does have that swinger mentality ....recretional sex ...but feelings and commitments are out of bounds.
I agree with the hooker idea..... Was that ever discussed?