Someone told you that it’s terrible when a man sleeps with another woman.
(A lot of text)
____________
You wrote it all so funny that it is not clear whether you consider betrayal to be the reason for divorce or not.
But any normal person thinks that yes is a respectable reason. You know why? Because it is clear to anyone that sex is not just a stupid biological need, but an act of mutual trust, tenderness and love. If a man is sick while his wife recovers after childbirth, no one cancelled masturbation.
Of course, you can decide not to pay attention to betrayal (or forgive, hz), for financial reasons or anything else, but you should not impose this decision as the only true to everyone around. Betrayal is terrible. Betrayal is unusual. Cut on your nose.