Insta-rec!

Someone linked me to this, and it's great. :)

Empty Graves (6539 words) by Unpretty
Chapters: 1/1
Fandom: Superman - All Media Types, DCU
Summary:

Time travelers who plan to kill Superman never account for Martha Kent in their plans. She may not be the World's Finest, but she's a mother with a shotgun, and all told that might be scarier.