Since her mother married a much younger man from Israel, I asked if it changed the way her family now eats. (I didn't try to explain that all Jews do not "keep kosher", or anything like that.) She said, "I DON'T WANT to give up pork!" She also didn't like not eating meat and cheese together.
I wonder if there's a way to help the children understand what is going on, instead of just saying "everything's all weird now at home".