13 The investigation confirmed it . Delphine had been selling information to anyone who'd pay - Cubans , Russians , even the FBI . She'd never loved Aiden . Never cared about the O'Sullivan legacy . She was just a climber who'd seen opportunity in a widow's role . We arranged a meeting on neutral ground - an abandoned warehouse by the docks . The Brennans , O'Sullivans , and Fitzgeralds all had representatives there . Delphine arrived thinking she was meeting her Cuban contact . The moment she saw us , she knew . " Cillian , " she tried , tears already starting . " Whatever they've told you H " Shut up . " His voice was dead . " We have the recordings . The photos . Everything . " She switched tactics , hand going to her stomach . " The baby " DNA test came back yesterday ," Mrs. O'Sullivan said coldly . " It's not even Aiden's . " The mask finally dropped completely . Delphine's face twisted with contempt . " You stupid Irish fucks . You think your honor means anything ? Your traditions ? I played you all . " " Yes , " I said quietly . " You did . And now you'll pay for it . " In our world , justice was swift and final . Cillian pulled his gun . His hand didn't shake . The shot echoed across the water .