I recently (Nov 27. 2010) moved to an apartment (in the state of Texas) with my 23 year old niece in tow. I told the apartment staff that she was a houseguest and would not be staying long. They still required her to be on the lease. I refused, so they let her sign a "Roommate Addendum". As I suspected, things went sour between us and I have asked her to leave (Jan 18th, 2011). But she isn't leaving. She pays no rent, no utilities or any help what so ever. I asked my apartment staff but they have been no help. How do I remove this person from my apartment legally?