Some assumptions must be made. We first need to assume that Vergil and Kat have had sex. Dante was fully nude when he and Kat first met. So we have to assume that Kat told Vergil that he has a bigger d*** than Dante.
Q- if Satan is the prince of darkness, who's the king? A- UbberDevil, and Sparda is my Queen. GT: MongooseDave2