By definition the conversion is only good if you accept the 613 commandments, so there's going to be more scrutiny from others than for someone who is born a Jew and remains one even if he keeps 0 commandments.
They warn you of this before you start the conversion process when they try to discourage you from converting.
If they didn't fully accept adherence to the commandments at time of conversion, the conversion is meaningless.
Isn't her adherence based on the teachings of the Rabbi doing the conversion?
Example: Rabbi says it is not mandatory to cover your hair in public.
Also once she goes through the process and it is completed who here has the right to say she is not a Jew?