CLV, when we first seperated two of my brother-in-laws contacted me to see how I was doing. At that time, I was really broken and told them the entire story. They were shocked, and then went on to tell me things about the W that shocked me (e.g., always been deceptive). I also told them they needed to support her becuase she was family.
After this I went out with them a few times to grab a couple of beers but now that she has introduced the OM to the family, I have stopped this. I agree with MHL, I would not contact her family. I know you miss them and I am sure they miss you but they are likley still trying to figure things out and need time to adjust as well.