I like my mother in law, really I do, though she can be a bit of a pain but then so can I sometimes. We recently moved house (last week) and are still waiting for some bedroom furniture to arrive so bedrooms are a disaster zone i.e. living out of cardboard boxes at the moment. I had an appointment this morning and MIL very kindly offered to watch DD while I was out. Anyway, I returned to find a car in my driveway that I've never seen before, come in to my house and no one about. Go upstairs and find MIL showing her cronie (who I have never even met) round our bedrooms. It turns out MIL rang her friend and asked her round for coffee so she could show her our new house. I'm a bit hacked off by this, not just because I was a bit mortified at all the boxes but just that it's MY house, not hers to show folk around like a bloody museum curator! I think it's cheeky and when MIL said 'I hope you don't mind' I did say 'well I'd rather you didn't do it again' and now she's in the huff. AIBU?