Unfortunately, if you are not listed on the policy and drive the car on a regular basis, it's not likely that you would be covered. Permissive use usually extends to those who drive someone else's car, but that is usually capped at no more than one use per month.
As long as your husband is going to drive the vehicle and park it as his residence, he can insure your car under his name and policy. Because you own it, you would need to be listed as an additional interest in the policy.
If they are legally divorced then he cannot list her on the policy if she does not drive his cars. If they are not legally divorced then he will need to list her on the policy but exclude her the policy if she is not driving the vehicles.