I truely understand where you are coming from. my DMIL lived with me for 37 years and While I was at work she would do her thing and it was always "Just trying to help". I really don't accept this excuse. We should all respect each others space and not intrude. She had the whole house to do her thing in but just had to do it in my little sewing room too. And she never knew what I was talking about when I had to ask her where she put something. I replaced so many things over the years because I just could not find stuff after her helping out.
She is not of this world anymore and I wonder if god is missing anything!
I always used to ask her if she would like it if I rearranged her bedroom dresser drawers every week and threw out her crossword puzzle books.
My DH follows her lead and I can never find anything in my own house but it does keep him close!
Just look at all the trouble Neat freaks cause!
If all the mothers out there could teach their kids one thing it would be to respect other peoples stuff and space. They will get along with their future partners much better!
:-D
peace