Accident or intentional, if they swallow my blood it's the same result.

Sorry, I should clarify. By voluntary, I mean they remain mortal. Assuming they were to begin with. It's essentially swearing an allegiance. I had one where I was, and I have one here. [ Just so there's no shock if someone starts fawning over her and calling her his queen. These things come out at weird times. ]

I much prefer immortal relationships personally. There's nothing like someone who understands.