I while back I attended a fundraiser for a local family ( and local official) that had a medical issue that was going to be very expensive. I bought tickets to the meal, and wrote a separate check to the cause.
Now I find out that the local official has been stepping out on his wife and doing it with another female in the same department he works in.
My first question would be what do you mean by "now I find"? Did you witness it personally, or did someone tell you this is what's going on?
I have to agree with local historian. If you felt it was a serious enough medical issue to contribute, why isn't it still? (your post sounds like a set up to air rumors in public and I doubt you even contributed anything)