We are having bil, sil, mil and two very elderly relatives for christmas lunch. When my DP and BIL were a bit younger they spent many a Christmas with their parents as guests of this older couple - we thought we would like to repay their kindness by having them for Christmas lunch. They live half an hour drive away so need picking up and dropping off after lunch. SIL phoned a few minutes ago to ask whether she could do anything towards Christmas day. I said yes, could you drop off elderly couple after lunch and we will pick them up before lunch. She (sil) said it was not the best day for me to invite the elderly couple for lunch and could I not have invited them another day? They have to drive in their car to get to us anyway (sil doesn't drive so it will be bil doing the driving), I don't see what the huge problem is to be honest. I am steaming - how dare she tell us who we can and can't invite to our house for lunch. She is pregnant and told me that she is more worried about her pregnancy than I might have been as this will be an "only child" whereas I have 4 children. I did say "Oh you mean if one of mine gets run over it doesn't really matter because I've got three others" and she just said yes wtf I want to scream.