Angelina's Baby Sister (episode)

Summary
Angelina now has a baby sister named Polly. Unfortunately, Angelina's parents are too preoccupied with Polly to give Angelina attention and are quite disorganized, such as Mr. Mouseling accidentally putting Polly's baby bottle in Angelina's lunchbox instead of her lunch. Angelina then becomes jealous, frustrated, neglected and upset, and starts crying and having a tantrum, feeling like her family doesn't care about her anymore and goes as far as to destroying her room in a fit of jealous rage. The Mouselings hears a lot of noises upstairs and Mrs. Mouseling decide to go check on Angelina. Angelina says that she and the others don't care about her anymore, but Mrs. Mouseling says that she does care about Angelina and loves her as much as ever, but Angelina says no she doesn't and all she cares about is Polly. Mrs. Mouseling says that's not true and that she loves both of her daughters. Mrs. Mouseling tells Angelina that she knows it's been hard, but Angelina will always be special to her and said that she was very first baby. Angelina performs her solo dance and soon Polly wanted to join Angelina in her dance. Angelina was glad to have Polly and pointed out that she wanted to take her back to the baby shop yesterday (and her father says that he's glad Angelina didn't do that) and names her the "Most Promising Sister of the Year."