I can sympathize. I have a mother that has kept butting in and screwin my stuff for over 20 years now. Even now when I've moved, she still likes to come over and "take care of the mess".
Just for that, I keep my seeds and many other valuables in VERY SAFE places. The kinds of places, no one would ever look in (hollowed out cell phone, in pots with plants between the soil and the pot, etc).
The only thing I couldn't hide from her was my fiancee. Does that routine never get old?
PS: and my cats just looooove to nibble on my wacky tobbacy more than on any other plant and then get all spacey and run around the house.