I think it's realistic that Aden would fall for Belle who obviously is predisposed to having an additive personality - a bit of a bad girl and highly sexual. Even though he knows he doesn't want to be a part of all that stuff in his adult life, his subconscious is still drawn to it. He looked after his dad and so he's comfortable looking after Belle. So he's operating on different levels - different reactions to the same thing. Ultimately though I think the power in the relationship is weighted to Belle - she's had previous relationships and her first love was Drew. There's something about first love, before you've known heartache, that is unrepeatable. So Aden's first love is Belle but Belle's first love isn't Aden, so I think that always had the potential to hurt Aden more.