I don't wish to meddle too much, but are your other five children involved in any notion of a 'family unit' at all? This shouldn't all be strapped to your back, particularly if you have grown and autonomous ones.
If daughter is having problems, the last thing you need are factions within the family. I'm going through that now with my older sister, though we're approaching peace and happiness.
Prayer helps a lot.
Make your opinions known, Dad. You've been blessed and deserve an emotional harvest.
You have mail. My other children are all adults except for the 7 yr old. Each of my boys are a blessing, as is the 7 yr old daughter. We all have been through hell with my daughter. But we still love her. We all have been through therapy for this and we function very well as a family. Even with my oldest daughter's problems we have been a close family with much love between us. I am the mother, by the way. Thanks for the post. ~~Pandora~~