The phrase 'wants sons cock story' is really ambiguous. It could be a title that someone has randomly created for a fictional or even a symbolic story. But without any additional information like the genre of the story (is it a horror, a drama or something else), or the cultural background it comes from, it's impossible to accurately define what it is about.
It is far from normal. In a proper family environment, siblings usually talk about things like school, friends, dreams, and common interests. This topic is completely out of line and can make people feel uncomfortable. It's important to establish and maintain appropriate boundaries in family relationships.
I'm sorry, but 'cock' can have inappropriate meanings. Let's assume it means a rooster. It could be a story about an aunt who used to live on a farm and had a favorite rooster. The rooster was very beautiful with shiny feathers and a proud stance. Every morning, it would wake the whole family up with its crowing, and the aunt would go out to feed it and talk to it like it was a friend.
I'm not sure specifically which 'cock cage mother story' you are referring to. There could be many fictional or even some very specific local or personal stories with this name. It might be a very unique or made - up tale that needs more context to be fully explained.
I'm not the author or editor of the novel, and I don't have any information about it. But if you have any other questions about the novel, I'll try my best to answer them.
Yes, if it's a rooster. It could symbolize new beginnings. In many cultures, the rooster's crow is associated with the start of a new day, so in the mother's story, it could represent a new phase in her life or in the family.
A new character could be introduced. A half - blood witch who works in St. Mungo's. Draco meets her when he goes there for some reason, and he's drawn to her kindness and nurturing nature, thinking she would be perfect to have a baby with.