I believe that you need to answer the inquiry unless the father is restricted from access to his daughter's activities. The failure to pay for something may be addressable in court, but it doesn't necessarily prevent the parent from sharing in his child's activities. Hoewver, if the wife is now saying they want to support the cello, then try and work something out to cover this in writing. However, try and have this done with a lawyer. Your question did not say whether there was any written court order regarding the cello payments (or a property settlement agreement) or whether this was just an agreement between yourselves.
Answered on Jun 03rd, 2016 at 12:09 PM