Your opinion is noted, and of course you're free to pick an impartial and unbiased third party to do your instruction and flight reviews. Of course if you pay them, it could be construed as affecting that impartiality.
For the rest of the world, but the words "relative", "spouse", "son", "daughter", "family" appear nowhere in Part 61. There is nothing in the regs that prevent a qualified flight instructor from providing instruction, endorsements or flight reviews for anyone including friends or family members. If you believe otherwise, you can certainly read and search through the regs yourself and see if you can find something that supports your opinion. I couldn't.