When D.J. and Stephanie wants to do anything that Danny wouldn't allow them to do, like staying up late to watch TV, they ask Joey, because they knew that Joey always go easy on them, and when Joey says no, they use their "secret weapon". And meanwhile Michelle was a picky eater, and Danny and Jesse are trying to get Michelle to eat vegetables.
Then, Danny wanted Joey to be tougher so he did get tougher, and he ended up grounding D.J. when she comes home late, but D.J. got mad because Joey never grounded her before, and she started to change into a ruder attitude when talking to Joey. I liked the part when they had the family meeting with the "talking stick" part whn everyone discuss about Joey's toughness.