Thanks everyone. The dysfunction did not really come out until the MLC hit. My inlaws did everything they could to cover up ex's shenanigans. They were more concerned about appearance then helping their son. It was actually quite sad to watch.
MIL would come over to the house and pick up my daughters and try to explain to them that "daddy is still a great guy". I was so concerned at all the mixed messages the whole situation was giving the children.
In laws could never look me in the eye after they knew what I was thinking. I had called them up shortly after ex moved out and told them I thought they lived very hypocrital lives. There only answer to that accusation was that "god forgives anything they do". It was such an eye opener for me. I realized then and there that I had to do my best to protect the children from their behaviors.
Now that MIL is gone, I don't have too much to worry about in that area anymore. FIL is in his own little world and more concerned about who his companion is rather than how the family is doing. The kids have maybe seen him 3 times since MIL's death. He like ex is full of the "poor me" attitude.
Me: 46 H:44 Together: 25 years Married: 20 years Separated: 11-30-06 Divorced 12-21-07 OW: EA began 2005 PA began end of 2006 3 children,20, 16, 6 ex asked for forgiveness 01/16/11