Once your former landlord lost legal title to the property you originally rented from her you no longer have any obligation to pay rent to her. Your obligation for rental payment is to the new owner of record.If your former landlord tried to evict you from the unit that you are renting, she will have to prove ownership to the unit to be entitled to evict you or prove that she sub-leased the unit to you where she was the tenant of the current owner. From what you have written, this is not the situation.If your former landlord continues to pester you about rent, you should advise her that you, she and the current owner of record need to sit down and discuss the situation.Good luck.