rental/land contract breech I had a land contract with my tenant which was up…

rental/land contract breech
I had a land contract with my tenant which was up this PAST December. She failed to purchase the house as agreed. We are now just going month to month (with NO CONTRACT) on her word that she will again try to purchase the home in December of 07′. I was behind in payments, and she was behind one month, I got set up through my mortgage co., on a repayment plan. I was to pay by the 25th of every month or I was put out of the program and all monies owed was due up front. My tenant had TWO bounced checks this month, which caused me to go PAST the 25th in payment. I am not able to pay everything up front, therefore the home is going into foreclosure.
QUESTION: Because there is NO CURRENT contract of any kind, if I keep her $$$ every month until the home goes into foreclosure, can my tenant sue me for anything?