No, it is completely inappropriate. Such stories involve highly unethical and immoral content that goes against basic family values and social ethics. We should focus on positive, healthy and ethical stories and topics in our communication and media.
First, we need to have a strong sense of morality. Know what is right and wrong. Second, we should be careful about the information we consume and share. Only choose positive and ethical content. Third, if we encounter such inappropriate content, we should firmly oppose it and not spread it further.
Sharing such a story is highly inappropriate as it involves private and inappropriate details about a family member. Family members' privacy should be respected, and this kind of content is not suitable for public discussion.
Share stories that promote family values such as unity, support, and love. For instance, a story about how the family came together during a difficult time. Make sure the story is something that can be told in all family settings without causing embarrassment.
This could be a very strange or misphrased statement. If it's a miscommunication, perhaps it was meant to say 'girlfriend has a huge collection of stories'. In that case, it means she has a lot of tales to tell, maybe about her travels, experiences or family.
I'm not sure specifically which 'huge cock story' you are referring to. There could be many stories that might use this phrase in a non - vulgar way, like a story about a large rooster perhaps.