Sue Ellen's Little Sister
D.W.: "Maybe there's a contest for lonely children after this"
Arthur: "It's only children, D.W.! A lonely child is what you're gonna be when I sell you!"
http://tvtropes.org/pmwiki/pmwiki.php/Ymmv/ArthurS2E20HowTheCookieCrumblesSueEllensLittleSister
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