Absolutely. But then, the border patrols has to look at you when you pull off the mask, and here lies the problem. My feeling is, they'd probably look at her if she resembles the woman on her photos, with lustrous hair (it seems she might have used some fillers at that time), but given her ability to mimicry, without cosmetic, she might look too average to register with them.
Another consideration: if she is not flying alone (and she may not be), they can easily miss her. Border patrol must be aware not only of "a single woman, 5'8", 125 lbs", but of her potentially being a part of the couple, or a group. This "group factor" is something I have observed - they look at the leader and maybe, a child, but not the rest. So if she doesn't speak and keeps low, she will pull off the mask, and be not registered as "that KA" with the border patrol. If you look at how she behaves in the airport, she is like a fly on the wall.
(Could CS travel abroad to take her out? Guilt, etc... Or, more likely, some old flame, a friend? Or some yoga group going to a retreat?)