Continuity mistake: Anne has the kids trick her by putting glue on plates, and they stick to her hands. She gets even by spraying the whole family with a garden hose - no plates on her hands. Then they chase her outside, and she has the plates stuck to her hands again.
Suggested correction: She has the plates on her hands the whole time she's spraying everyone. You even see the plates after Dean says they need forks and the camera is behind her.