How dare we object to being humiliated by our cheater!
How dare we object to our cheater dirty dancing with another partner!
How dare we object to our cheater taking another (romantic) partner as their plus one!
Cheaters treat faithful spouses as the unreasonable one. Ironically, they are the unreasonable ones in these scenarios.
Cheaters act entitled to humiliate their spouses, and then double-down on that entitlement when called on this misbehavior.
It is disgusting.