Never even made it thru your whole post, but serial infidelity? At least 3x by the time I stopped reading? And now she wants to blame this on you going golfing too much?
Sorry ... SEE ya. Cut her loose. The recidivism rate for serial adulterers is damned near 100%. She has a serious character flaw, and until SHE gets some professional help and owns up to it, you're going to have nothing but heartache with this woman.