A dripping hose can't possibly flood a basement in two days unless the end of the hose is placed inside the basement. The problem isn't the leaky hose, the problem is a leaky foundation. Ask her if she intends to sue the contractor who built the house with the leaky foundation or if she is just going to get her leaky foundation repaired and properly sealed. Then ask her to pay you in cash for the services rendered. Her paying you for services rendered and her seeking a judgement against you for restitution for alleged damages to her property are two separate and non related issues. If she refuses to pay you the money that she owes you, immediately file a lien on the property and suspend services indefinitely.