Fiona first met Michael Westen when she was in Ireland with the IRA when he went undercover as Michael McBride. Despite their clashing personalities, the two eventually developed a romance, but it came to a sudden end when Michael left Fiona literally in the middle of the night, without a word because Michael's cover was blown. Due to Michael not updating his emergency contacts in years, Fiona picked up Michael Westen in Miami, Florida, after he was stranded there when he was burned because she was the only emergency contact; and she has since helped him numerous times in his various jobs. Now that she has encountered Michael again, Fiona makes efforts to pressure Michael into a more substantial relationship. Fiona also keeps in touch with Michael's mother, Madeline.