I have often encountered a plot where a man arranges a duel between women. These can be a wife and a mistress, two mistresses or candidates for the role of a girlfriend. He sets a condition that he will stay with the winner. The loser must leave. This is literature, fantasy. How are things in real life? Girls, women, please write, would you fight for a man if he demanded it of you?
I mean, specifically the man's initiative. Not the situation when you decide to confront some bitch yourself.