Don't eat my ice-cream, okay?

What's so special about Gwendolyn eating ice-cream? Aren't everyone sick of seeing her eating ice-cream already? What's so special this time is that after paying for the ice-cream and she needed to keep the change in her pocket, she entrusted Mama with her cup of ice-cream, pointing 1 finger at Mama and said : Don't eat my ice-cream, okay?! Both Papa and Mama were in SHOCK.....