Silent follower here.

I think it is the right thing to do like job said to set those boundaries needed to be set in place. Good job on that.

What is her need to tell you how happy she is without you?

That's an easy one. She isn't. People who are truly content and happy in their lives do not feel the need to continually blame and spew at the ones they believe were the cause of their unhappiness. People who are as happy as she says she is, wouldn't look back to what they claim makes them unhappy. No reason to go there if they are truly happy.

She is clearly one miserable sad woman. Any woman who does what she has done to her kids must need to believe something in order to go on.

Hang in there. I'm glad you have blocked her from you phone. You deserve peace.