4 days after my aunt died, my uncle died, once again to follow her.
That is definitely true love, I have seen that a few times here locally as well where the second spouse will go days to weeks after the first.
My grandma's sister, at age 84 determined that she had seen everything that she needed to in life and several weeks earlier declared she would die on Easter, which she did. My uncle did hang on a little while, passing on election day. This was several years ago when 84 was still considered "old" but they were living at home and in decent health up to the point that my aunt made her declaration. My uncle went into a nursing home shortly after that and continually asked his closest grandson to bring him his pistol in so he could get to see grandma sooner.