Vampires?

I have a vampire queen who is creating her own clan with a few men from the human world she turned. I had to go a bit twilight in reasoning how she can have babies, basically in the vampire world there are a few (maybe less) rare women who remain fertile and able to conceive. She is one of them and having babies born vampires is more desirable than turning humans, makes them more powerful. She picked who she deemed the strongest men to father her children. Don, J and Paolo and they are her consorts and clan protectors. Together they are building the largest and strongest clan.

As for them all appearing to be the same age. I like to think that once they die and their vampire powers take over they no longer age obviously. They reach maturity and then they freeze. I still see the parent vampires as elders but they just don't age like humans do.