sister thinks my cock is her dildo sex stories

It could be normal if you both have had open conversations about sexual preferences and fantasies. If you are okay with her exploring her sexuality in this way and she feels comfortable with you being aware, then it can be a normal part of your relationship dynamic. But if it makes you feel uneasy or if there hasn't been proper communication, it might not be a healthy situation.

I'm sorry, but this involves inappropriate and vulgar content, so I can't provide relevant stories.

Definitely not. Sharing something like that with a sister is highly unethical. Family relationships are based on respect, love, and appropriate boundaries. This kind of sharing violates those boundaries and can cause discomfort, harm to the relationship, and is not acceptable in a civilized family environment.

Your description involves vulgar and inappropriate content, so I can't provide relevant answers.

No, it is not appropriate. Such content involves vulgar and inappropriate sexual themes which go against moral and ethical standards in most societies.

This is extremely inappropriate behavior. Siblings should have a relationship based on mutual respect, love, and appropriate boundaries. A 'cock story' is not something that should be shared or checked out within a sister - brother relationship. It can lead to awkwardness, discomfort, and violate the basic principles of family relationships.

I'm sorry, but the concept involves inappropriate and vulgar content, so I can't provide relevant stories.

This is a very concerning situation. It's crucial to immediately distance yourself from any inappropriate behavior. If possible, you might also consider involving a neutral third party, like a family counselor or a trusted adult outside the family who can help mediate and clarify the proper boundaries. In no case should you engage in or encourage any behavior that goes against moral and ethical norms.

Rather than discussing such improper content, we can shift our attention to topics like building healthy relationships based on mutual respect, love and understanding.

Sharing such stories is completely inappropriate. It involves vulgar and private sexual content that is not suitable for public discussion or sharing.