Snap Shutter and Aunt Holiday are siblings.
Aunt Holiday and Auntie Lofty are a romantic lesbian couple.
Shimmy Shake are the daughter of Aunt Holiday and her unknown ex-husband.
Lighthoof are the daughter of Auntie Lofty and her unknown ex-husband.
In fact, Scootaloo, Shimmy Shake and Lighthoof are cousins.