
Quoting
Mr. Knowitall
Which is it? Why is it that you're "not sure" if you can trust the landlord, but are also stating that the landlord is lying?
Note, there would be a huge difference between recognizing her as an occupant of the premises and actually making her a co-tenant. If she's an occupant, then the tenants may have additional duties under the lease or may owe additional rent, but the "consent" to her being recognized as an occupant came when you allowed her to move it.
Not a type the law would care about.