I've been there. Not with an actual writing disorder, but depression, anxiety, totally falling apart when an essay is due, etc.
Yes to CBT, it really really really is a great thing. No to your husband's stance on not letting her live at home again. Does he want her to be homeless? Feeding her and giving her shelter and a gentle push to get up and go to her job at Walmart and to her therapist isn't being an enabler.
But, maybe it's not the right time for her to be doing this. Some time, some undemanding work, let her hormones settle down, mature a bit, let her find a purpose for the study and she may well do some study later in her life.
