I'd bet you my bottom dollar that my cousin is cuter than yours (why are you calling your second cousin a nephew lol? It's not that hard to remember that a cousin's kid is your second cousin). Of course, she's three so I think she wins automatically.
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Nio slug bunny- http://img.imgcake.com/nio/60gennypngda.png
Raka anime chick- http://img.imgcake.com/Rheine/Gennypngmu.png