Changeling Spy’s parents (description)
In my headcannon the old/ non-reformed Changelings are normally living in Equestria but they have hidden life so ponies thinks there are only reformed ones. About it’s being knows only King/ Queens, childs of them and it’s friends that tell them.

Sometimes happens that reformed and non-reformed Changelings have kids and it’s childs are named half reformed. About the non-reformed parents knows only Kings and Queens and child relatives.

In my TF2/ MLP world Changeling Spy’s mom stayed in reformed nest for nesting her eggs and dad had to leave her because of problems he could made.