'You're Still My Father'- Kendall Jenner To Caitlyn Jenner

What will you call your dad if he changes to a woman. Dad? Mum? Well, of her the daughters of Bruce Caitlyn Jenner just answered the question.

Kendall Jenner writes on her instagram :'Just Because Your Appearance Is Different Now Doesn't Mean You Were Any Less of a Father"

So Caitlyn is still her father? How can a woman be your father?