What are the possible reasons in little sister beat up older brother stories?

Another reason could be that she doesn't fully understand how her actions affect her brother. She might think it's all in good fun, like when she teases him about his appearance or his hobbies. But to the brother, it can be really hurtful. She may not have developed enough empathy yet to realize that she's being a bully.

One reason could be personality. If the little sister is more extroverted and the older sister is more introverted, the little sister might be more likely to take the lead. For example, in social events, the little sister would be the first to start conversations or make new friends, making her seem dominant.

One story could be that the older brother took the little sister's favorite toy without asking. The little sister got really angry and started hitting him with a small pillow. She chased him around the room until he gave the toy back.

One reason could be that the sister is more dedicated in certain areas. For example, if it's about schoolwork, she might study harder. So when she gets better grades and shows it to her brother, she defeats him. And she might shame him by saying something like 'I study while you just play games'.

One reason could be that the little brother has been disobedient. For instance, if he was told not to play with a certain dangerous item but did it anyway. Another reason might be that he has been unkind to others, like bullying a younger sibling or a neighbor kid, and the sister feels it's her responsibility to correct his behavior.

This is a rather unusual situation in most cultures. However, in a make - believe or very young children's play scenario, one could imagine a story where a little brother, perhaps in a game of 'pretend family', tries to diaper his older sister's doll as if it were his sister. But in real - life, this goes against typical social norms.

In some family - centered stories, the little sister is really into girly things like tea parties. She convinces her older brother to participate. She makes him wear a crown and a cape, and they have a 'royal' tea party. Through this, the brother is feminized as he takes part in an activity that is often seen as more suitable for girls. He might even start to enjoy it and become more open to 'feminine' activities in general.

Genetics can be a major reason. Maybe the sister inherited taller genes from a grandparent or a distant relative. Sometimes, nutrition also plays a role. If the sister had a more balanced diet rich in essential nutrients like calcium and protein, it could lead to better growth. Another factor could be physical activity. If she was more active in sports or outdoor activities, it might have promoted her growth.

Another reason could be disobedience. If the little brother doesn't follow the family rules that the older brother also adheres to, like coming home on time. The older brother might scold him saying 'We all have to follow these rules, you can't just do whatever you want.'

Misbehavior towards others is also a reason. For example, if the brother and sister are fighting with each other or being mean to their neighbors or friends, the mom may feel the need to discipline them firmly. Also, lying can be a cause. If they are caught in a lie and the mom wants to teach them a lesson about honesty, she might spank them. However, it should be noted that these are traditional reasons and in modern parenting, there are better ways to deal with these issues.