I'm not sure yet but there are hints, I bet this will be something Aiden liking Sofia which according to the novel he isn't supposed to, and the novel kept trying to kill her off, hence all these scars of failed attempts...so Aiden figured it out and that's it's because of his feelings and he's trying to get with a guy, like the novel wants him to while keeping his distance from Sofia so she wouldn't get hurt more.
I'm not sure yet but there are hints, I bet this will be something Aiden liking Sofia which according to the novel he isn't supposed to, and the novel kept trying to kill her off, hence all these scars of failed attempts...so Aiden figured it out and that's it's because of his feelings and he's trying to get with a guy, like the novel wants him to while keeping his distance from Sofia so she wouldn't get hurt more.