In summary, all available evidence suggests that Corey Fogelmanis does not have a sister. His parents have never mentioned having another child, he has never been seen or photographed with a sibling, and he has never publicly acknowledged having a sister. While it is possible that he has a secret sibling, there is no evidence to support this claim.
Ultimately, whether or not Corey Fogelmanis has a sister is a matter of privacy. If he chooses to keep this aspect of his life private, it is important to respect his decision.
