Wow these parents will stop at nothing. Yes, follow the advice of others on here, document, prepare for investigation. Parents will write things that are exaggerated, but experienced licensors know this too. They just want you to have a plan. In the meantime no longer accept her child if it is within your contract that you can term for ........ She sounds like she is fishing for a way not to pay you.
Kudos for sticking up for yourself and saying she has to pay you
