I posted a while ago about serving dog food to the woman my brother in law eventually married. Wendy hasn't changed much since then. She did shut up after she went to a few different taco places and they all told her what proper barbacoa is.
So anyway now whenever we have people over I always prepare a meal specially for her. Usually just plain unseasoned meat (other than salt and pepper, I'm not a monster) plain green salad with ranch on the side, and a plain starch like a baked potato or white rice.
I do not limit her to this food. I just always have it available in case she finds something offensive about the other food I make.
We recently hosted a dinner party that included my wife's brother and his wife. We also had some new friends over. Thea, the wife, asked if my sister in law had allergies since she was eating plain roast chicken breast with the aforementioned sides. She was worried about cross contamination since there was a lot of other food there I guess. Thea is a teacher and is hyper vigilant about food allergies.
This lead to Wendy explaining that I use cuts of meat that she did not grow up eating and that I refuse to tell her what is in the food I make.
This is a fact. I learned my lesson. I make food my friends and family enjoy. If I use an ingredient that may be against a dietary restriction I make it clear. For example if I serve pork I let everyone know. I also will answer any questions about allergens.
My sister in law says that I insist on feeding her the most bland food possible. I pointed at the salsa verde on her food and asked her if it needed more serranos.
The whole story came out and Wendy was embarrassed again. I don't think it was my fault. I have been passive aggressively been making sure she cannot complain about my cooking.
My wife says that maybe it's time to stop making a separate meal for Wendy. I said she is lucky I don't serve her dino nuggets and lunchables.