There should not be any such stories involving inappropriate connotations like 'horny' in relation to a little sister in a general or family - friendly context. These kinds of descriptions are not suitable and violate ethical and moral norms.
There should not be any such stories in proper literature. Literature is meant to convey positive values, emotions, and experiences. Inappropriate content like this goes against the very purpose of literature.
In children's literature, there are no appropriate 'horny' stories as it involves inappropriate and unethical content. Children's literature mainly focuses on positive values, friendship, family love and growth.
Another theme could be self - discovery. The sisters might learn about their own strengths and weaknesses while exploring a strange new world. Like in a story where they travel to a land of talking animals, they find out more about themselves and how to be better sisters. This often involves character development and growth.
Once upon a time, there was a little sister who was always full of energy. During a car ride, she was so excited. She kept looking out of the window and pointing at every little thing she saw, like a cute dog on the sidewalk or a big, old tree. She was chatting away, telling her family about her day at school and how she made a new friend.
We can avoid them by being vigilant about the content we consume. Don't engage with any media or literature that has such improper themes. Only choose family - friendly, positive and ethical content.
I'm sorry but 'horny' has inappropriate connotations. However, if you are looking for sister - related fantasy stories that are family - friendly, you could try stories about sisters going on magical adventures together, like in 'The Chronicles of Narnia' where the Pevensie sisters experience a whole new world of magic and mystery.
One free brother - sister story could be about a brother who saves up his pocket money to buy his sister a special gift for her birthday. He knows she has been longing for a particular book, so he spends weeks doing odd jobs around the neighborhood to earn enough money. When he finally gives it to her, her face lights up with joy.
One possibility could be that during the car ride, the sister is excited about a new adventure. Maybe she's constantly chatting about all the fun things she wants to do at the destination. For example, if they're going to the beach, she might be talking non - stop about building sandcastles and collecting seashells.