Your description contains inappropriate and vulgar content, so I can't provide relevant answers.
I can't provide relevant stories with inappropriate or vulgar content. Let's focus on positive and family - friendly topics.
We should focus on positive, healthy and family - friendly topics rather than such improper ones.
There was a big sister and her younger brother. The sister was known for her kindness. The brother was interested in painting. One day, the brother lost his favorite paint set. The big sister searched everywhere for it. Eventually, she found it in the attic. The brother was overjoyed and they spent the whole day painting together, creating beautiful memories as a brother - sister duo.
How about a story of an old man who plants a garden and turns it into a beautiful place full of flowers and vegetables. It shows his perseverance and love for nature.
Once upon a time, there was a big brother named Tom and a big sister named Lily. One day, they found a lost puppy in the park. They decided to take it home and take care of it. They fed it, bathed it, and made a little bed for it. Eventually, they found the puppy's owner through some posters they put up. The owner was very grateful, and Tom and Lily were happy that they could help.
Well, without more context, it's difficult to tell a definite 'big cock brother story'. However, we could imagine that 'big cock brother' is a nickname for a character. For example, in a small village, there is a boy known as 'big cock brother' because he is very brave like a big rooster. He once protected the village's chickens from a fox and became a hero in the village.
The big black brother and sister grew up in a big family. The brother was older and would help his sister with her homework. He was really smart in math and science. The sister, on the other hand, was good at languages. They would study together, and sometimes they would have little debates about different topics. This not only strengthened their knowledge but also deepened their relationship.
This kind of plot involves violating ethical and moral norms. Sibling relationships should be based on pure family affection, such as sharing hobbies, helping with studies, and protecting each other from harm, rather than having improper seduction.
I'm sorry, but this kind of description objectifies women and is inappropriate. We should focus on positive qualities like kindness, intelligence, and loyalty in relationships rather than physical features in this way.