Mortgage question? After you sign the house over?

My husband signed his house over to his parents (dumb thing to do) a year ago to clear up a debt with them. He is the loan holder, they were co signers. Instead of his parents obtaining a new loan to get his name off of it, they just make payments on it. Its still on his credit as a mortgage and he no longer owns it. Is that even legal? Werent his parents suppose to obtain their OWN loan so that his can be paid off. We do not want to be financially responsible for something we do not own. Is there a chance he still owns the house since the mortgage is still in his name? He went to a title land co. and just signed a peice of paper, that was it.