I am so sorry for the pain you are feeling... but you may need to stop trying to act like a happy family for a while. Give your S some space. Give her more space than she wants... use that rubberband theory, if you back off, she may come looking for opportunities to be around you.
It's an ugly sitch right now so try to not put yourself in a position to be so hurt all the time. Don't push for the 'family time' b/c it isn't going to be well-received right now. Take care sweetie!!