Su66, I know what you mean. One of our DILs is the same and it annoys me. She allows little toddler GD to go upstairs but accompanies her - and then opens our bedroom door, on the pretence that the little one wants to see the cat. They go and search all round the room for the cat even though she is likely to be out if the house is noisy. She uses the upstairs bathroom, although we have a loo on the ground floor (I don't mind the upstairs bathroom being used if there is a queue for the loo, and there often is if a number of people are gathered.) Even worse, this year she used our ensuite - saying the bathroom was being used. I had to bite my tongue. I was so cross. She likes to prowl around, even opening the door to the garden on a freezing, grey day. No - you are not being unreasonable.