Fritz LeiberFritz Leiber's novella "Night of the Long KnivesNight of the Long Knives" features a couple (man and woman) of "deathlanders" who ambush a pilot early in the story which then goes from there.
The man is older than the woman, but they are not related.
The story opens:
I was one hundred miles from Nowhere--and I mean that literally--when I spotted this girl out of the corner of my eye. I'd been keeping an extra lookout because I still expected the other undead bugger left over from the murder party at Nowhere to be stalking me.
I'd been following a line of high-voltage towers all canted over at the same gentlemanly tipsy angle by an old blast from the Last War. I judged the girl was going in the same general direction and was being edged over toward my course by a drift of dust that even at my distance showed dangerous metallic gleams and dark humps that might be dead men or cattle.
She looked slim, dark topped, and on guard. Small like me and like me wearing a scarf loosely around the lower half of her face in the style of the old buckaroos.
The story is available on Project Gutenberg and there is an audio version on Librivox.
