My hubby's mother is a hoarder, buying shirts from garage sales and bagged them up and stack them in bedrooms, closets and downstairs basement. Filled with clutter. I do not know too much of her history but it gets bad. And hubby's bedroom was filled with garage sale items bagged up, toys and books stacked high and his closet was filled as well. Not only that, her dogs and a cat peed anywhere they want to and tried to cover it up with air freshener.
I refused to step foot in their house unless hubby needs my help removing his personal belongings out of there. Hubby has some traits of her OCD, with his bread twist ties and all kinds of nails and screws picked up from anywhere and said I might use this some day. I end up throwing alot of his stuff away because it had no meaning or use (too rusty, broken, etc) and he didn't remember them a week later. So I have to be on top of him for that. Would he do it? You bet! If I let my guard down, and not house proud, he would have everything piled up like his bedroom was LOL! I had to get a box to put his items in there so when he says where is my screwdriver? In the box, dear! would be my reply LOL!
His dad collects broken stuff and says you never know when you will need it statements. UGH! Even he tried to take my BIL's knife that broke and FIL said, wait, do not throw it in the garbage, it can be recycled. What!!!!!!! the motor burned out and the knive blades were dull, so BIL threw it in the garbage and told my FIL NOT to touch that electric knive cutter!