We have been neighbours for over a decade and get on well and have always pet sat (pop in a few times a week level) for each other. I just came back from a two week holiday and noticed that either she or her teenage DD had logged into the YouTube account on my television.
Feeling a bit odd that one of them was making themselves at home in my house. Do I say something? Find a way to get my key back politely? Or assume that teenager wanted some space away from mum and ignore?