Oh wow, I am so sorry hoardersSO. I grew up with two parents who had hoarder tendencies. It was extremely detrimental to my social development (never having friends over, never learning how to keep things orderly).

If you could do anything to stop your kids from growing up the way I did, it would be very good for them. Effectively stealing your daughter's bedroom to store junk is really an awful thing for your SO to do. Does he ever acknowledge that he has a problem?