You may have even an ex-wife or an ex-husband, but you can never have ex-children.
That gal's all skull and no brains. She's like Joe Frazier with lipstick.
Many people fail not so much because of their mistakes; they fail because they are afraid to try.
All my sons are named George Foreman. They all know where they came from.
I respect that you want to protect your niece. You know, I didn't want my daughter to become a boxer. Neither did Mohammad. But Joe Frazier, on the other hand, he had his baby girl boxing in the crib.
Don't try to reinvent the wheel. Just learn from the guys who have already done it well. You need a mentor, a seasoned coach who is willing to share his wisdom and experience with you. Ask someone who has already been successful to guide you.