Yes, this is amazing, perhaps even more so is that circa 2000 there were three still living. The Sons of Union Veterans hosted a gathering in which they all showed up, as I recall. One of the three was the widow of a member of a United States Colored Infantry regiment. My memory is a little foggy on if these three were all Union widows or if it included the Confederate widow mentioned in your link. I tried to find a link to a story about this gathering that was in
The Banner (official SUV publication) but I couldn't find it. All of these women, of course, were -- in today's parlance -- trophy wives.
P.S. A less charitable view would be to call them "gold diggers" who were after the old guy's pension.
P.P.S. SUV is now officially SUVCW (Sons of Union Veterans of the Civil War), but I still use the old name most of the time, as do many members. The major reason for the change is that too many idiots out there in Peoria, Podunk and MTV-land thought that "Union" referred to labor unions and not the union of states of the US of A.