She did need it - in order to reveal herself without giving away that she was a skrull.
This is exactly what a skrull would say, trying to give people a false scent!
We can never say never, of course, but I don't see a good story reason for her to be a skrull - the basic payoff for that will be "Aha! I'm a skrull! which is kinda weak compared to a "fall from grace/redemption" arc.
Filming for Secret Invasion hasn't even started yet, so setting up elements now might be a tad premature.