Nemo's mother appears briefly to enforce household rules, specifically instructing Nemo against taking food like pie at night. She intervenes when he attempts to sneak downstairs, directly resulting in his return to his room without the pie. After Nemo's experiences in Slumberland and upon awakening, she is present when he apologizes for breaking his promise about the pie. Her reaction accepts this apology, coinciding with a parental agreement to take Nemo to the circus. Her role remains confined to these interactions: establishing the rule and receiving Nemo's apology after his dream journey.