My roommate moved out in January, unexpectedly. She wrote a letter to the landlord that she would still be making her rent payments until the end of lease, May. The landlord changed the locks and now she wants a key. I have mailed her the last of her belongings - two pots - and do not need her to help clean when the lease is up. I have notified him that I am moving out as well. We did not have to pay a security deposit even. I do no want the ex roommate to have a key to my apartment and have access to the place when I am not there. Is there any obligation to provide her one?