My wife KK did a lot of revenge fucking, mostly as retribution for my affairs with other women - that was in the "before" times. When I failed to react with jealousy, instead encouraging her to fuck other men, she refused. There was never a "good" explanation - as it turns out, she was afraid I'd use her behavior as an excuse to continue fucking other women.
As we transitioned to our current hot wife lifestyle, part of that transition was a series of revenge fuck episodes. KK openly fucked other men, but did not include me in the action. It was simultaneously maddening and insanely erotic.