Coming Out After a Hetero Relationship?

Erin
If you're involved with someone in a heterosexual relationship and then they come out later, is it possible that they still had romantic feelings for you? Obviously there's no such thing as "turning someone gay" or anything, but I'm just curious.. Like, is it a genuine "I'm only straight for you" type of thing or is it just someone suppressing their sexuality? (Please correct me if I'm being offensive)