Sloane tells Nadia that his affair with Irina was "brief". However, given that he once thought Sydney might be his daughter and that Irina left while pregnant by Sloane when Sydney was six, the affair must have been lengthy. See more
[undercover as a priest
I was married... for a short time.
That being your secret?
That... being part of it. Now obviously, that was... before I had... the collar. The woman I was married to betrayed me. She betrayed a lot of people. And when I found out what she'd done, I let my... my hate for her consumed me. And I began to wish, the woman I loved, was dead. I woke up everyday imagining how I'd do it. What was the best way, what was the most efficient way. I mean, it's all I wanted. That ...