My father was a civilian University flight instructor turned major airline pilot. I was an airplane/airport groupie. Dad did NOT give me any formal instruction, always passed me on to a friend or professional. Of course, when we flew together, it was still an intense learning experience. I did some of my first actual IFR work with him in the right seat. Still, he did not want me to take it personally when I needed to be corrected during my formal training. I was way more nervous trying to please my Dad than a mere mortal.
That said, when I became an instructor, I did solo my youngest sister in a Warrior, but she chose not to pursue the PPL. We got along well during the flight instruction, but the ground school portion didn't go so well.