One possible outcome is that Edward will use his mob influence to protect Bella's niece from any threats. Since he's a mob boss, he has power and resources at his disposal. Maybe he'll give her a life of luxury and safety she never had before.
At first, it might be a bit tense. The niece may be wary of Edward because of his mob connections. But as time passes, Edward's kindness and protection could win her over. For example, he might take her shopping or to nice restaurants.
One possibility is that Renesmee is simply curious. She might ask them what they are doing in a very innocent way. For example, if they are having a private moment, she could break the mood but also add a touch of humor to the situation as they quickly adjust to her presence.
The mob boss might be initially suspicious. He could think it's a ploy by an enemy to gain his sympathy or get closer to him. So, he might keep a close eye on Edward and Bella at first.
Another theme is the idea of forbidden love. Edward's mob activities are illegal and dangerous, and Bella getting involved with him goes against the norms. Their relationship is often a struggle between their feelings and the consequences of being together. In many of these fanfictions, there's also the theme of protection. Edward uses his power as a mob boss to protect Bella from various threats, whether they are from his enemies in the criminal underworld or other external forces. This protection aspect adds an extra layer of complexity to their relationship.
The Cullen family might also get involved in different ways. Some of them could be sympathetic towards Bella and offer their help, while others might be more hesitant due to the implications of a half - vampire baby. Esme, for example, might be very motherly and try to take care of Bella, while Rosalie could have mixed feelings because of her own history with not being able to have children.
At first, Bella may be resistant to Edward's claim. She's likely a normal girl thrust into this dangerous mob world. But as Edward shows his protective side and she gets to know the real him behind the mob boss facade, their relationship blossoms. Edward may use his power to court her in a unique way, like taking her to exclusive and dangerous places that only he can access. This builds a sense of adventure and closeness between them.
The power play. The idea of a mob boss interviewing an ordinary person like Bella creates an instant power imbalance that makes the story exciting.
Well, one possible plot could be that Edward, as a mob boss, has to protect Bella from rival gangs because she witnessed something she shouldn't have. Another might be that he claims her as his own in the mob world to keep her safe while also falling in love with her in the process.
One idea could be that Bella is a journalist trying to expose Edward's mob activities, but she ends up falling for him instead. Another could be Edward protecting Bella from rival mobsters when she gets caught in the crossfire of his underworld business. A third plot could be that Bella is a singer in a club owned by Edward's mob and they develop a relationship through her performances at his establishment.
Well, it could be that Edward is homeless because of some dark turn of events. Bella's encounter with him might be the start of a new adventure. She might introduce him to her friends in the fanfiction world, like Jacob, and there could be some tension as Jacob may not trust this new 'homeless' Edward right away.