you should read the walkthrough pdf on the OP, it explains how to navigate the Sin infiltration, whilst gaining the most money for your information and keeping your suspicion score low enough to tell Met and Rina to refuse the mark and leave.Never got that choice. I told them the ceremony was mind control shit and revealed myself to them. And they're all "we'll stand with you when you refuse the mark and vow". But then we go back in, get separated when I get taken to Langdon and then Nyx pops in to get us out. And we just leave them behind.