I've had this happen too. I went away for a week to wales on a uni field class and came back to find everything had changed. I'd explicitly told her not to touch anything, she'd explicity promised no to and yet when I returned she very much had
. What the hell was she thinking?
She'd stuck my plants on top of shelves so they were in the dark near the ceiling and almost dead (she has a thing where she's totally cluless about light. She thinks that angling venetian blinds downwards lets more light in since it lets her see the street. It completely evades her that the light comes mostly from the sky, not the street, and that when the plants look dark, it's a sign that there's little light incident upon them.)
All my stuff was in odd places, my bed was in a crappy position and I'd been looking forward to getting back to my familar old room after a stressful week away, only to come back to find that I no longer had a room and that it had been replaced by some alien place. When confronted with it, she smiled in her stupid way and truly seemed to think that she'd done something nice for me, then got all defensive and started on about how I should be grateful, how it's so much better like that, that I shouldn't have had it the way it was before, it was her house so she could do as she liked and so on.
This was repeated in it's entirety the next year when I had a field class in Majorca. Again, I was not amused.
My mum has an odd psychology to her where she can do things for one (bad) reason, all the while 'knowing' that she's doing it for another (good) reason. She often tries to get me to do things 'because I really want to' by saying stuff like "Just think how much more comfortable you'd be if only you did X". Sometimes I manage to extract the truth from her ("Just think how much more comfortable you'd be if only you did X" translates to "I want you to do X because Y is annoying me", but it's difficult since she seldom seems conciously aware of her motivations.
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Banned for discussing the recent spate of bannings.