I understand what you are saying. I do agree that the kids should come first tho--if they enjoy their time with you and you with them--then take them. Thank her for giving you more time with them. They are precious and the only real victims in a D. It is her loss that she is not developing a strong R with them, if that is the case.
In the end, that matters more than dollars and cents. My oldest D lost her dad when she was little--he took off finally and hasn't seen her in many years. I was angry and worried for her. Now I pity him--she is an amazing kid and it is truly his loss!
If it is true that you are having them more than the custody agreement, then I would say to document it every time. Email paper-trail every change in the agreement. If several months go by, you might consider running this by your L or even her. If it is true that you are having them more over time, then the order for support can be reevaluated. You can always change these agreements, so do the leg work now.
Blu
“Forgiveness liberates the soul. It removes fear. That is why it is such a powerful weapon.” – Nelson Mandela