Our fifth child is in her early 30s and living with us at home for the past several years. She’s divorced with no children. When she was a baby, she seemed to suffer with brain fog. Life is difficult for her.
If she has debilitating mental or physical illnesses that threaten her safety, it’s important for you to put aside the relational concerns and press her to get competent medical help. This would be no different than pressing someone with a serious wound to get to the emergency room.
Ultimately, you may even consider creating an exit date for her so she can begin preparing herself to live independently. While you can offer to provide her with safe and clean conditions where she can grow, if she doesn’t use these to her benefit, you have to determine how long you can personally sustain these conditions.