*Don't* let her continue this behavior.  What's cute, or at the most, mildly
annoying in a kitten can be downright dangerous in an adult cat.  The best
thing I've found to stop this behavior is to give a loud, high-pitched
"MEW"* when they do this and immediately take all attention away from the
kitten (a sort of kitty "time out").  Be sure to always use a toy and not
your hands when playing with a kitten and distract them with the toy before
it gets to the hand biting stage.

*This is the instinctual behavior that kittens use with each other to let
the other know that the play is getting too rough.

Hugs,

CatNipped