Mississippi mineral rights reservation

Sold property in Mississippi but failed to reserve mineral rights, however, found addendum to parents will "For Reservation of Gas, Oil, and other Mineral Rights only", it says the mineral rights owned by Mom and Dad "can not be conveyed bysale of property or surface rights and it is forever reserved for conveyence only to the natural children of Mom & Dad." or to their kids who survive them. Does this mean we still own the mineral rights?