Peaceful:
I'm so sorry for what you and your wife are going through. I don't have advice for this particular situation, but I wanted to mention a helpful book.
I am currently reading Dr. Wayne Dyer's "Pulling Your Own Strings". It is for people who have or are being victimized. Your in-laws, as well as you and your wife, clearly are victims. You mentioned in the other post that your mother-in-law is taking anti-depressants as a result of this situation. YOU did not do this to your mother-in-law; it is her choice to believe these controlling men who are pointing a finger at you and your wife. I'm sorry that it seems to be "your fault"; people are upset and putting the blame on you. The big picture of this situation tells a different story: you are simply standing up for what you believe in. The other parties are reacting in the way they were taught. Everyone in this situation has a choice on how to behave or react....or judge for that matter. YOU have a right to stand up for what you believe (or not believe) in. Anyone who disagrees by pointing a finger is simply trying to get you to do what THEY want you to do.
You have more guts than most people in the organization.