Nope, he has complete right to use his property any way. So , don't worry if his wife will fight than there is no need to worry about it as you will be having full legal right and access after a will.
My Husband Wants To Leave Everything To Me. I Am His Wife By The Law And Not His Kids But We Are Scared His Ex Wife Will Try To Fight It, What Do We Do?
I would recommend ensuring there is a legal will in place and that you are the beneficiary on his policies, etc. Consulting a lawyer to ensure everything is in place and worded correctly can save you time and stress is case of the unknown.