I can only imagine your pain, I too feel the pain of what is happening to us...and the ones we were once so happy and in love with...
But they are NOT WHO THEY ONCE WERE, she is LOST, remember.... she is twisting in the wind, has no idea what is happening within her...so she is running trying ANYTHING to make the pain go away...
and unfortunately WE are the ones that get the brunt of it because we are closest to them.
Have compassion for her. Look at her as though she were one of your children, with something going on within them you can do nothing about, you hurt so badly for them, you pray for them but you can not fix it, just have compassion and love her from afar.