If he was introduced formally & his last name was Cooper, she could ask if he had a nephew called Aiden but if his name was different she might not realise who he was. Any interaction between the cast would then depend on what had happened in the meantime, especially what had happened with or to Aiden. There are numerous possibilities.
It could also be the case that the Uncle works for the Don, or maybe for an equally, or more powerful Don from a rival crime family. Again it's a bit of a kaleidoscope & things could get complicated, not least for Sophia.
Thinking about storylines of this type, I can't help but feel that it would drag the VN out even more than at present but who knows, this might even be already planned as the start of the forthcoming difficult way out of the tasks. That's assuming we ever get that far, of course.