Re: Your first and only Love
My insurance policy covers any driver I authorize to drive my car. Which is good because if they do something, my insurance is in force. If they are not authorized, my insurance is not in force.
Any owner of the vehicle can authorize someone else to drive it. I speculate OP's wife can legally authorize posom to drive the car. If he wrecks it or injures someone, the insurance would be valid and in fact protect OP. However, protection only to the limit of the insurance.
If you're making all the payments for the car, go take it back.
Your lawyer may have ways to take you off of the liability for any damages she or posom may cause with the car. Legal separation or a public announcement (e.g. published notice in the local newspaper) may create the legal firewall to protect you. Separation/announcement in my state is enough to sever financial liabilities such as new debts.
You do need to talk to a lawyer.