Oh, initiated under strange circumstances. I really like that idea! She doesn't go sharing this knowledge with any Tom, Dick, and Nancy, but once she knew he was a hunter, and pretty serious about it then she'd help him out as best as she could.
As a hunter, she has more of a moral compass than most. She's not prejudice against the supernatural, and won't kill unless there is proof of them taking lives. So depending on what route you go with him they could butt heads from time to time.
Ooo, yes! Give me the angst and drama. We can hash out what exactly went down (or even scene it out) when you figure out more details about your hunter?