When a man gets cheated but only goes after the dude, is he just as upset at her too?

One of my friend's younger brother got cheated on. He went after the other guy and fought him. The dude knew she was taken. A couple other men reacted like that too, charging at the other man.

Long ago before I was even born, that's how my father responded too when my mom was his girlfriend. She cheated with his friend. He kicked his ass, gave him a bruised eye.

One thing in common with them: the girl was spared. She saw his full rage when fighting the other guy. He only insulted her.

Even though they all went after the guy, I can't help but wonder he would be just as upset at her too?

When a man gets cheated but only goes after the dude, is he just as upset at her too?
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