I am wondering if i NEED PERMISSION from my ex husband just to hyphenate my kids' last name to my new husbands name. Example: their last name now is smith, my new husbands last name is jones. so i want them to be smith-jones..... i am not dropping the ex's name, just adding another. i hope i dont need his permission cuz that doesnt seem fair. especially since i changed mine to jones. i want the kids to have part of my new name also.