Ex wants off loan. Both names are on title. Long long story. Ex left 2 months after signing vehicle loan. 3 years later wants off. Lender said there is nothing my ex can do, they can’t make me sell nor can they make me refinance. Is this correct?

Also, ex claims they’re going to be taking “legal action” if necessary. Basically bullying me into releasing the vehicle.

I drive, pay, insurance, and maintain the vehicle. The lender is even willing to release financial documents to show that ex hasn’t had anything to do with vehicle since signing.

My question. Can they actually do anything? Can my ex actually force my hand into selling or refinancing the vehicle?