Adam had conflicted feelings about his aunt after reading about all the things that she had been involved in and caused over the past year.
He felt slight guilt and respect, blaming himself for not being strong enough to save her sooner, but he knew that what he was feeling wouldn't help the situation.
Staying calm and making sure that his mind was clear, Adam was ready to complete his end of the deal with Nathaniel, before following his aunt's trail.
His aunt moved across the world without using much transport and hadn't used any planes either until she reached Russia.
For unknown reasons, she stayed there for quite a while and was likely to have left there recently in order to continue her journey.
From the direction and area she was last seen, she seemed to be heading to China and Adam knew that it was likely that she would be heading there, since it was where she was born and grew up.