If she comes back, it won't be til next season. She has 6 pins, and a metal plate in her left knee/tibia now.

She has been in the hospital since it happened last Saturday. Should be out soon.
As far as advice goes, she doesn't recommened learning in shallow water, for obvious reasons. Don't underestimate the consistency of the wind, or the power of the kite.
Anything can happen, at any time.
Thanks for your sympathy.