"Why Did You Have to Die" joke

A man placed some flowers on the grave of his dearly
departed mother and started back toward his car when
his attention was diverted to another man kneeling at
a grave. The man seemed to be praying with profound
intensity and kept repeating, "Why did you have to
die? Why did you have to die?"
The first man approached him and said, "Sir, I don't
wish to interfere with your private grief, but this
demonstration of pain is more than I've ever seen
before. For whom do you mourn so deeply? A child? A
parent?"
The mourner took a moment to collect himself, then
replied, "My wife's first husband."