Hephaestus

I agree with whoever said to spend time with your father in law, you might find it rewarding if he's a knowledgeable person. I think you can bite your lip for 4 days, this whole thing reminds me of Everybody Loves Raymond, except you're in Ray's wife's position. If saying something about your MIL gets your wife worked up, why not just try to show with body language your distaste in the situations that are bothering you.