My W seems to have a split personality, or an extremely hard time being honest, or maybe it is her mother pushing her to do what she's done. I tend to firmly believe it's a combination of all of those things with the last point being the strongest reason for her actions.
Scorp, I know you don't like to hear it, but there is another factor in play here. Don't discount that influence.
I agree with everything Wonka says. It's time to take off the gloves and lawyer up. You need a temporary custody order immediately.
Everybody hurts. It's part of life. Don't miss the good stuff.