All the single...mothers!

Just to make it clear: the title doesn't refer to the mares in the picture, but to their mothers xD

Diamond Lily is Rarity's daughter and I don't have a single clue who her father could be. But I honestly don't care either. I like to picture Rarity as a single mother and can't really see her with anyone *shrugs*
Diamond Lily is a very confident young mare and loves to play with the colts that adore her, just for the fun of it. She's very elegant, her behaviour is always smooth and her mood never slips.

Party Popper is Pinkie's daughter and I guess it's obvious who her father is. Party Popper was a big suprise for her parents. They actually never intended to stay together, so Pinkie Pie decided to raise her daughter on her own. Party Popper is very optimistic and happy (not hyper like her mom though) and has her own party supply store in Ponyville. (Pinke Pie, Pokey Pierce, Party Popper, lol)

Sour Apple is Applejack's daughter. Her father is the Wonderbolt Soarin. The reason her parents didn't stay together is Soarin's career. They technically wanted to stay together, but their idea of how to lead a good life didn't really fit.
Sour Apple has a rather pessimistic attitude, but she'd never leave her family hanging.

The bases were made by
Links to the bases: [link] and [link]