The trauma of the husband cheating lowered or created a emotional-blunting episode, her mind was fried and used her son to attempt to humiliate her husband only creating abuse with her child. It's a text-book case of bringing your kid in while fighting with your husband or wife trying to get them to pick a side. The wife was messed up in her head, trying to guilt her man and tweak her kids brain for life, I think she had a mental breakdown.
Is the wife totally wicked for doing this or did her brain freak out and do you find her circumstances should be weighed before judging her as a child-abuser? It's abuse inflicted on her kid but is she 100 percent guilty of going mental?