I identified with poly before having another love interest. I was actually single when I first learned a name for what I felt for so long. I wasn't able to pursue it until this past summer but it's something I've always felt comfortable with, loving more than one person.
Neverwhere - exH, we have a son together.
Amanda - Neverwhere's 1st wife and one of the reasons my marriage to him ended. They have three sons together.
Mark - Neverwhere's brother. We are dating. He is mono.
JBR - My boyfriend of 8 months, also poly, has kids, we live together.