It could be that the mom was trying to keep the kid quiet so as not to disturb others in the cartoon scene. Or perhaps the kid was making a commotion at an inappropriate time.
It could be a mysterious or quiet style. Maybe it aims to create a sense of suspense or secrecy.
I think the cartoon could have a simple background, maybe in a classroom or library, with the girl trying to hush someone. Her glasses could give her a studious look. Maybe she's trying to keep a secret or stop a disturbance.
Maybe the kid is in trouble or wants something urgently.
It could be that the kid had a great day and is sharing the joy with mom by hugging her. Or perhaps the kid had a bad experience and needs mom's reassurance.
It could be that the mom said something that upset the kid, or maybe the kid is frustrated about something and taking it out on mom. There are many possible reasons.
Maybe the kid did something wrong or got into trouble, making the mom really worried and sad.
Well, usually a cartoon mom would gently pull the covers up over the kid and maybe give them a kiss on the forehead.
The kid could be showing a new toy he got or a drawing he made.
It could be that the mom is having a bad day and is taking it out on the kid. Or perhaps the kid didn't follow the rules and the mom is trying to teach a lesson.
It often shows love and protection. It can make the kid feel safe and cared for.