I'm sooo sorry to hear that Steve!! It really does make me feel sick hearing things like that. My kids mean are the absolute world to me, and I want to spend every available chance I have with them, and luckily my wife is the exact same way.
One day she will wake up and realize what she has done, and hopefully it won't be too late. Thankfully you are the one with custody! Hang in there, and just the kids an extra hug!