What you focus on expands. The more you look at the negative aspects, the more negativity will come to you. It is important to notice the positives for they'll come forward.
I agree and disagree with Sandi on some points. At some level, I agree with her points about W's shifty patterns which is why I am PUSHING HP really hard to draft the email addressing the parenting schedule, car and money issues for they're continuing to feed into her having it all without any sense of loss.
Where I diverge from Sandi is being cordial and friendly with W in interacting with her because you do not want to continue to feed and fuel into her negative mindset of you. It doesn't mean that you must act like buddy-buddy with W.