What are some common themes in erotic big sister stories?

One common theme could be forbidden love. In such stories, the characters might be in a situation where their relationship goes against some social norms or family expectations within the 'big brother' context.

This involves inappropriate and adult - related content, so I can't provide relevant answers.

One common theme is the exploration of forbidden love. In many such stories, the lovers are often in situations where their relationship is not socially acceptable, which adds an element of tension and excitement.

Authority is also a key theme. The big sister has a certain level of authority that she exercises. This can be seen in how she makes decisions for the family or how she enforces rules. For instance, she might decide that the family will have a no - technology day once a week, and everyone has to follow her rule. This shows her as the dominant figure in the family unit within the story.

Growth and learning can also be a theme. The big sister may teach the little sister new things like how to read or ride a bike, and at the same time, the big sister might learn patience or better communication skills through dealing with the little sister. For instance, when teaching the little sister math, the big sister has to be very patient.

Love and protection. Big sisters usually take care of their little sisters, like protecting them from harm.

This kind of content involves adult and inappropriate information, so I can't provide relevant answers.

Protection is a common theme. The big sister often protects the little brother from harm, whether it's from other kids or from getting into trouble. Another theme is guidance. The sister can guide the brother in school work or in making friends.

Growth and regression is also a theme. When the big sister becomes like a little sister, it can represent a step back in terms of development, which the diaper emphasizes. It could be about exploring what it means to be younger again, whether it's for fun or due to some external factor like a magical event.