Whoa, is Aunt Denise some sort of Flo-Jo? Can she seriously catch up to Marty after giving her a head start? That's impressive. She should really do something with that talent.
Lu Ann knows that kids don't act out. Even if you're raised by parents forced to cover up just in case the only other family that lives in your South Dakota town/the livestock finds out and there's a scandal. Even when aforementioned adopted family treats you poorly and generally regrets ever agreeing to take you on. You don't act out. You draw squiggles. It's healthy.