Oh, I get it... She was misinformed by the junior cowboy, and now she thinks that babies come from sacks of ketchup, and since there was just an apocalypse, she is working diligently with Indy Pete to save the human race - the knives are to more quickly pierce the sacks of ketchup. If only Li'l Billy Bob had simply answered her question the correct way, she'd go about re-populating the doomed Earth correctly (ew...) And in this, there lies the final epic tragedy, at which we can only laugh.
Shouldn't that be "dumb butts who cuss"?
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"He was cursed with a horrorshow of a face, like Guiseppe Archbold doing a study of mollusk tumors."