Part monster-1

"Now that one thing is done, let's try to find your brother. The worst thing about Nathan's involvement is that we cannot be sure of anything anymore. He's cunning but he's even more heartless than you think. Your brother could be anywhere inside here" Kuro huffed at that claim but her attention and focus in a single direction, her ears pressed back to her head. 

"I don't need your help though it would be appreciated. But I know you cannot trust me in this situation so I will make a deal with you. Accompany me this one time and I shall show you something that will change your mind" Mark heard those words but he did not react at first.

In honesty, he had expected them to come sooner or later, the other trying to prove to Mark that he was trustworthy and then have him do his work. It was how the story often worked its magic in most cases.