Marital contracts

I can imagine a situation where a wife that had turned down her husbands attempts to do anything kinky, or adventurous for a long time gets caught having an affair with a grocery boy.. Once confronted she confesses to how many times she cheated and she agrees on her own to do the same number of kinky things with out complaint if he forgives her. I imagine the number to be a bit unreasonable like 80 or 90..even 148, which she agrees to emotionally with out thinking about the number. I'd be the friend he wanted his wife to let join them for along time. So I'd be one of the things he ask her to do sexually, Then I would be around as he got her to do more, and more kinky things he had dreamed of. The idea of a somewhat reluctant wife giving into demands, and trying to make the best of it is a turn on. I like the idea of a house wife feeling awkward in a sexual way.