I am sorry that you are having some down time. Sometimes the down time helps us to think about things and hopefully when you are feeling better, you will be stronger from that period of down time.
Your father was trying to be a good father and FIL to your h and all he wanted to do was let your FIL know that your family still cared for him. I'm not a mind reader, but I think what your FIL was trying to say is that it's gone on too long and it's time for everything to settle down in the way of a divorce. Parents do not like to see their children suffering/hurting and he most likley has only been told one side of the story by your h. So, I can understand where he may be coming from. B, eventually the truth will come to light and his family and friends may begin to see that it was not you, but it's going to be a while. Yes, I can understand your FIL's statement being hurtful, but I do not think he meant the way you are taking it. I could be wrong...but I dont' think so.
Come here any time...this is what the forum is for. This is a safe forum as long as your h doesn't figure out where you are posting and you remove your cookies from your computer each and every day.
Try not to allow what your FIL said to your father get to you. Okay?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.