D, I think you are doing really well, however I think you are still watching her too closely. And I also think its too soon to date! I have 3 children myself and I don't think I'd date someone with kids, I think that could just get complicated. Imagine dealing with not only your own x, but someone else's x (who would be in the picture forever if there are kids involved) - double the x factor, I can't even imagine.
I think it was Anc who said you need to get your mind off W, she is right. The tricky part is that once you actually detach they start showing more interest, which kind of grabs your attention again. But don't fall for it! Detach, or fake it.