From: GenesisTwilight | #018
Unless that older unicorn is also Derpy's daughter, then Dinky is canonically not Derpy's child.
My problem is with Berry Punch and her sister. Wasn't Berry Punch once "overprotective pony parent" or something like that? Now apparently she's not a parent but a sister!
I don't think it really matters, Dinky could just be pulling a Sweetie Belle and "borrowing" the other pony as a sister because Derpy had work or something.
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_foolmo_
'and out of the blue and completely unprovoked came foolmo and his insult' - Anagram