Women are not asexual beings like men seem to think.The wife turn of the table stings harder. Women are supposed to be sexually desire-less.
And this isn’t really about sex. The problem is that he keeps his wife around in the home they shared together while screwing some other woman. He should divorce and not live with her if he really doesn’t want to be with her.
Women are expected to be saints who take care of men in old age, but they don’t seem to afford the same thing to their wives.