One Last Thing

This mission is the final one given to you by Pegorino. It's not techinally a mission just a cutscene. In the cutscene Niko meets up with Pegorino after killing or sparing Darko. Pegorino says that he's making a deal with Dimitri and needs Niko's help. He says he won't do it, after that cutscene he calls Roman and Kate and ask them what they feel. Roman says to go with the deal and Kate says to not go with. On the one's advice you take they die at Roman's wedding.