These kinds of stories are inappropriate and violate moral and ethical norms. We should focus on positive, healthy and respectful relationship stories.
There could be fictional stories where a character named 'Black Cock' has a wife who gets pregnant. But this is very much a made - up scenario. For example, in a small - town fictional story, Black Cock could be a local farmer and his wife's pregnancy could be a central event that brings about changes in their family, relationships in the town, and their future plans. But again, this is just a fabricated example.
I'm not entirely sure what this specific phrase means as it seems rather unclear and ungrammatical. It could potentially be some sort of made - up or very local expression.
No, it is not appropriate. Such stories involve very private and often inappropriate sexual content that should not be shared openly. It violates the privacy and respect within a relationship and is not suitable for public discussion.