Sounds like an opportunity to keep a pair of tactical flats in a desk drawer.

"opportunity" here sounds kind of crappy because of the boss/employee power dynamic and the man/woman thing to boot, but if she's not offended by the implication that she should bend to meet the demands of her boss, it could be seen as a plain savvy thing to do.

edit: just noticed I assumed the boss was a dude, maybe that's not the case, but the boss/employee power dynamic is the main bit