this is one for the courts, landlord can make the case that she is a part time resident of the home and therefore can come and go as she pleases, except for your room (in some states, in other states the owner still has full access to the room).
If the owner didn't 'live' in the home at all, all tenants would be entitled to notice if required by state law and the LL would need a reason.
I knew someone that had 2 residences. (although she didn't rent any rooms out). They were 10 minutes apart. One was her child hood home and the other her adult home...she would go to her child hood home during the day...and come to the other to sleep. She legally lived at the one she slept at.
the home doesn't have to be the legal primary residence of the landlord to give them 'residency'
just because she doesn't LIVE there, doesn't preclude her from using it as a day place and retain use of...if that is what you were told is the arrangement, then she has the right..
what do you think, you get to just pay for the room, but get the whole house to yourself