scootaloo origin and human turned mare tragedy idea

I have this idea for a combination human turned mare in equestrian crossed with Scootaloo tragic origins tale. It would start with some random human turning up in a bad part of Equestria as a mare. The mare runs into some thugs who decide to "have their fun" and leave her for dead. She gets found and rescued, nursed back to health, and is determined to be phisically and psychologically unsound to survive on her own, so is admitted to a psychiatric hospital for treatment.
Turns out she's pregnant from the gang of thugs. Due to her circumstances and mental state she isn't allowed any time with her orange and purple filly (which she hates at the time due to obvious reasons) and the filly is sent to an orphanage.
Flash forward a few years and the mare is released to start her life over. She moves to Ponyville where she is destined to meet the daughter she never knew.
She also still has issues with being extremely stallion shy and ptsd from her experience.