In the Bonus Feature in the Shout boxed set there is a scene where Martin and Natalie are in the girls' room and Patty sulks out of the room and Martin says "Do you think we were too hard on her?" and Natalie replies. "No...I don't care what Dr. Spock says you have to grind them under your heel before they turn on you" or something to that effect. My question is, From what episode is that scene?

I believe it's from the 2nd episode of the 1st season, episode is titled "The Genius". The scene you mention occurs during the teaser before the opening credits.