Does a PR need to get permission to sell real property from issue under intestate law in Maine?

I am surviving spouse and PR for my husband’s intestate estate which only consist of the house. There are 3 children of his ( from previous marriage), 2 of which have signed off of their interest. I am selling the house and need to know if I need permission to do so from the third child. (Adult). I understand that as PR I need to give them their share of the proceeds.