"her having sex with other men?"
men and women are not the same.
if a woman loves, admires and respects a man she DOES NOT want to have sex with other men. IF women cheat on their men they stopped respecting him a long time ago. it's always with feelings involved.
men are just men. they can sportfuck other bitches and still love his women the same.
tldr: high-value-men have options and leverage in the relationship. they can pull it off. average men don't.