I didn't understand the reasoning behind Bianca's opera career (or lack of) either. An opera singer was considered trashy simply because she stood on a stage? How ludicrous. Yet, Vergil claimed often that he didn't care about others' gossip, so why did he say he couldn't marry Bianca if she kept her career, but would travel with her as her lover? Even more ludicrous. I just didn't like this guy, but Bianca was lovely.