Apart from meeting Mina, Ian did not believe in coincidences. He did not think that a series of events could just so happen to perfectly line up, and he was not naïve enough to believe that Drew Loam had shown up at his mansion when he was mere minutes away from putting Lisa in jail for enough time to show her family that he was serious, and to prevent his cousin from acting.
What Lisa had done crossed lines that only one other person had dared to do, and that man was now dead of a 'heart attack.' Of course, it was Zane's father who had put him up to it, but there was not enough evidence or proof, which was part of the reason the man was still alive.