I'm really really angry but not sure if IABU.
DD and DN both go to my DM after nursery one day a week.
I got sent to a different office by work yesterday and it would have taken me nearly 45mins to get to my DM from there so I asked my DB if he could collect my DD with DN and meet me somewhere that I knew he was going which was much quicker for me.
Last night when we were about to go to bed DD all of a sudden told me that she hadn't sat in a car seat or booster in DB car. I'm really really angry, he has a car seat and booster in his car and if for whatever reason he wasn't able to put her in one I don't understand why he wouldn't have said, I would never put someone's child in my car with out a car/booster seat especially without making the parent aware. AIBU?