Agree with Open Eyes.
Your wife is at risk so I can figure why you are concerned. It’s not easy to get rid of someone even when this person was an abuser.
Many times, this person ( your wife) the abused person, didn’t realised that she’s being abused because there were patterns in her infancy that are similar so, she tends to justify the negative aspects and stress on the positive ones.

Many times I have heard about how a kid who is being abused or mistreat by his parents, no matter, the kid will respond with an “I love you mum, or I love you dad”. It’s a way to protect himself.

Like Lizard and others told you before, talk with your wife. She needs to know that you are on her side whatever it may happen.

I can figure how much you are suffering with this situation and I feel for you.