Ah, but she did almost die in an explosion.
Plus, why kill a supermodel that is known to have psychological problems. Anything she says won't be believed.
But i agree, she probably wasn't a real agent. Although she could still have done things like like mail something or deliver a package. She'd be in a perfect position to be a delivery agent. Superstars travel a lot and are rarely suspected to be secret agents.
Sounds like she had multiple personality disorder from repeated sexual abuse in childhood, and the rest of the story is part of the defense mechanisms. Of course, someone already suffering from DIDs might be easy to hypnotize, so an alternate personality which only exists to, for example, act as a courier, isn't that farfetched. Generally though, people who claim the gov't had them do lots of work, and on the other hand has been trying to kill them, is probably just nuts.