Eviction cases turns sour, need help

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I have an eviction case against a sec8 tenant which prevails in the precinct court, but the tenant appeared to county court. 

Yesterday I got the letter from her attorney appointed from the court, saying I owed her all the utilities bill since she started the lease on 2010, totaled more than 100K. Her claim is based on the sec8 paperwork which indicates the utilities are paid by owner.

The truth is when she applied her voucher did not qualify her for the property. She suggested putting the utilities under owner, that would get the housing approval. She agreed to pay the utilities. As a matter of fact she paid the utilities for years until last year she got evicted for nonpayment.

Now her side got a piece of paper showing the owner pays for the utilities

My side got the truth.

My attorney advice me to drop the eviction case because of this. And she says the county court is wrong court (dallas tx county court) for landlord, especially when the utilities issue pop up.

I agreed. Now the question is: How i am going to defend myself and the truth once she raised the legal battle? What is the odd of winning or losing? Any good attorney to recommend?