You might want to check out 'Dora the Explorer'. It sometimes includes storylines with baby sisters and teaches valuable lessons. Also, 'The Magic School Bus' has characters with younger siblings, which could be considered baby sisters in some cases.
Well, one popular cartoon could be 'Peppa Pig'. It often shows family dynamics and has episodes featuring baby sisters.
A good option could be 'Mickey Mouse Clubhouse'. It has various family-oriented episodes where baby sisters or similar characters play a part. Another one is 'Sofia the First', which showcases family bonds and might have elements related to baby sisters.
A practical answer is Chapter 19, because it turns the idea into a concrete scene. The chapter opens with What criminal law is this or that, this was originally none of your..., adds pressure through Brothers, go in and drag this bad woman out!" "I'll see who dares touch..., and ends on Please.
If you want the clearest chapter reference, go to Chapter 8. Early on, The resentment that had barely calmed among the crowd surged back two...; later, the chapter leans on Some of them were relatives of the Jiang Family, who felt it improper to....
Chapter 919, "Two More Grandsons", is the clearest early answer because it turns Seeing Jiang Li's situation into a concrete plot event. It opens with She turned around and immediately saw two little buns reaching out...
Chapter 911, "You Have Three Children?", is the clearest early answer because it turns Wan Huixia's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Bufan stood still, with his eyebrows furrowed, as if he was...
Chapter 903, "A Helicopter Came to the House?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Jiang Buchen might barely meet the qualifications to enroll in the....
Chapter 17 is the strongest chapter-level answer because it starts from Jiang Li glanced at Jiang Shixu, who was tense and anxious behind her, and... and follows through on I've been a mother for more than ten years but never tasted anything made....
Chapter 930, "Everything Is Just Beginning [Grand Finale]", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Yan was in a daze until he was invited on stage.
Chapter 48 is the strongest chapter-level answer because it starts from He Yun felt guilty for initially ignoring Jiang Li on purpose, and with... and follows through on Besides, everyone's phones will be replaced with special smartphones....
Look to Chapter 29 for the clearest answer. It begins with Big brother, it's me..." The shadow suddenly spoke and it was Jiang..., keeps building through Jiang Yan retracted the hand that he was about to throw something with., and lands on Big brother, are you unwilling?" His mournful expression.
A practical answer is Chapter 20, because it turns the idea into a concrete scene. The chapter opens with Several people turned their heads upon hearing the sound and saw three..., adds pressure through Miss Su, please clarify the situation and do not slander me unnecessarily., and ends on So, he.