So I was making this theory on >>1467796. This is the “Amethyst Star is Dinky’s aunt” theory (B). That’s kinda how I imagined it. Probably gonna post more versions.

Theory goes as follows:

“Given how old that filly already is compared to the Apple’s parents, it is entirely possible that she had several children, Amethyst Star and Written Script being probably the oldest of the bunch, and Derpy being the youngest given that she is about the same age as Rarity, which means both Liza Doolots and Dinky (who are cousins) are old enough to be the CMCs age.”