We hosted Xmas today. When clearing up and re entering the room I heard my FIL & SIL chatting, well taking the piss out of me for something that happened 10 mins earlier. They didn’t know I had come back into the room, I said you know it is bloody rude what you’re doing. I have hosted today and I have to listen to this. I left the room and continued to clear up.SIL said well this is awkward & called a taxi. Made an apology to my husband . He didn’t have a clue what had happened as wasn’t in the room. I said he should maybe speak to his dad clear the air, as it’s best not to leave it. He said no way it’s not for him to do. Is this unreasonable to ask?