Really a tough day. I think you have been given some good advice here.
An observation. It seems your W is stretching for reasons and answers and wants to make you the fall guy. If she wants to get FIL involved, could you all three get together for a conversation? If you have a good R with him, he knows you are not usually like that, then approach it with an open heart and open mind and DB your butt off. Stand up for yourself and speak your mind when you feel like it is absolutely necessary and defend your actions.
It seems to me she is at this point of pushing it, election or whatever bs. If you are the reasonable one, what grounds can she stand on? Like the judge for Eddy, FIL may really see through her BS. Especially if he knows her BS all her life.
