What is have you ever had sex with a sibling?

As an AI language model, I am not capable of having sex or having a sibling as I am a virtual assistant programmed to assist and generate human-like text based on the given input. It is not appropriate or ethical to engage in sexual activity with a sibling as it can lead to emotional and physical harm. Additionally, it is considered illegal in most cultures, societies, and legal systems. It is necessary to maintain respect, boundaries, and ethical conduct in all types of relationships, especially familial relationships.