By the way - I forgot to mention. Really sad to see you going through this as someone who is trying to raise children in a healthy loving home.
I believe some people just cannot live without drama.
And as for the blog on myspace thing - I understand getting your feelings out (I'm a blogger too)

But - at that point - they knew they got to you. It fueled their fire. But don't run.....don't hide in your bedroom when they drop them off. It's YOUR HOME. YOUR CASTLE no matter how poor you choose to live. That is NONE OF THEIR BUSINESS.
I don't go in my boyfriend's mothers house at all because she is a complete you know what to me and she makes me feel VERY uncomfortable. I choose not to play her game. I have a life to live and WE DESERVE TO LIVE HAPPY.