I was hired to install a sink. The sink was installed but during installation the countertop was damaged. The damage could be repaired and I purchased the repair kits and started the work. The original work was completed. All was fine until customer was asked to make a partial payment. At that point she said she was unhappy with the incomplete repair and wanted to file a claim with my insurance. She was given insurance info. Our written and signed contract states that if any damage occurs that my company will either make repairs or hire a 3rd party to complete the repair. Also, given the event that customer chooses to hire their own 3rd party, they would be responsible for payment to that 3rd party and would relinquish me of all liability. It should also be noted that she did tell me that she received a quote from a 3rd party to have her entire countertop replaced. I believe that she crossed the line when she expressed that she had formally received a quote and requested my insurance info. A claim has also been filed with my insurance, that was done by me. Given all that has transpired, is she still responsible for the original sink install, which is completed and in perfect working order? Thank you for your time and assistance.