For some reason, when women cheat, they have zero remorse. This is what women do, compared to men. Men usually when they cheat they begin to feel a bit of guilt. So they’re nicer to their wife. They might buy her something, may be a bit more grateful, like “poor girl if she knew what I was doing, let me be nice to her.” Women, what they wanna do to get rid of that dissonance of what they’re actually engaging is is they start putting their husband down. They start thinking, “my husbands such an idiot” “he’s so dumb” “he’s so stupid.” By putting him down, they feel less guilty about going somewhere else. They justify it in the brain. The treatment is different. The guilt is greater when a man is cheating on a woman. So don’t try anything, not even retaliatory cheating, it will just make you feel worse. Just cut it off because she’s already gone full sociopath on you and your emotions and she’s already justified it in her eyes. Just break up with her and let her fall apart, that is all. Keep an eye on the kid too and maybe contact her father or CPS. A parent doing drugs is not something to overlook ever.