You pressed charges against her right?

Why do people never hold their significant other accountable and go after the other person?

People love their significant others and are afraid of losing them and being alone, so out of fear they choose the next best/easiest target, which is the “mistress” to take out their anger. Unfortunately most people are not self-aware enough to realize their displaced feelings so they are just reactionary and ignorant about it.

I never understand why people attack the other person rather than their own cheating partner (not that either is a good option). Usually, the other person is like in this case, oblivious they are with a cheat.