Parents:
Mothers: Fluttershy & Tree Hugger
Father: Bulk Biceps
Children by Parent: (From left to right):
[Fluttershy & Tree Hugger]: Flower Crown
[Adopted]: Amber Lily {Earth Pony}, Lucky Star {Purple Unicorn}, Hot Head {Pegasus}, and Anthea {Pale Unicorn}
[Fluttershy & Bulk Biceps]: Heartsong
Children(From oldest to youngest:)
[Adopted]
Amber Lily {Earth Pony}
Lucky Star {Purple Unicorn}
Hot Head {Pegasus}
Anthea {Pale Unicorn}
[Blood-related]
Heartsong
Flower Crown
History:
[Note: Twilight’s “Legal Polygamy” is already in effect by this point, Fluttershy has married both Tree Hugger and Bulk Biceps]
Due to a mishap at the hospital, one of the medical reports “confirmed” that Fluttershy was barren, meaning that she could not have a child. She went into a state of depression for some time before her husband and wife brought up the idea of adoption.
After weeks of consideration they rushed (by which I mean Fluttershy dragged them) to the orphanage, she immediately grew attached to four of the children there, and thanks to Twilight pulling some strings she was able to adopt them all.
At a later point in time the hospital discovered the mix-up and immediately called her back to explain the mistake. While she was there she discovered that she was pregnant with Bulk’s child; Heartsong, much to her shock and joy. A year after Heartsong was born she eventually gave birth to Flower Crown as well. While her adopted children were worried that this meant she wouldn’t want them anymore, but she reassured them that she would love them all the same, and her daughters would have four amazing older siblings.
One year later, Discord gave Fluttershy a special gift in the form of allowing her to traveling through time, space and dimensions to discover lots of new animals, creatures, and eldritch abominations. However in order to survive in such environments she need to be given the proper body to traverse such realms. As such Discord provided his second gift: turning her into a draconequus like him.
After several hours (or years, time is weird in certain dimensions), she thanked Discord for the wonderful gift and asked him to change her back.
But Discord simply replied: “What kind of a friend would I be if I took back my present?”
It took her while to figure out how to shapshift back…