According to Jim - Period Peace

Seizoen: 7 - Aflevering: 7 / 153 - Eerst uitgezonden: 05 februari 2008 - Episode ID: 5763

When Ruby and Gracie can't seem to stop fighting, Jim is "forced" to read their diaries to determine the cause, only to realize that he needs to give out delicate motherly advice to them, while Cheryl is still away.