Ian knew that Mina was telling her truth. She was probably tired of surprises and mentally unprepared for another shift in perspective. It was also as Zane had said, Ian had defended Lisa because he did not want her to retaliate, but that small interaction would be all Mina needed to think his words were a lie.
"Mina, I get that you are tired, but you are not confused." Ian walked closer to her and kneeled to meet her eyes. "You just don't want to accept it because it is coming from me, but you still trust Dom, right?" It was not Ian's proudest moment, but he could not use himself as an example of trust and Zane was only Mina's confidant from lack of options. The mention of Dom however, always made Mina feel safe. It had once bothered him, but now he was glad for it.