"...but it absolutely breaks my heart that my FIL would do this to my mother."
Hello Mike,
I've never visited your thread before, but I did read your last message. I'm so sorry your heart is breaking. I understand how this could hurt you, especially since he was like your own father.
I did read somewhere -- too late, of course (after I called all my H's family and friends and unloaded him on them) that we should "STAY OUT OF FAMILY ISSUES WITH OUR SPOUSE'S FAMILY AND FRIENDS."
I know that part of your concern involves your OWN family. I'm wondering if this is a ploy of some sort, in the eyes of your W or FIL to get you to react, which you haven't done. I'm proud of you for it.