It's not the quantity of vamps, it's how fast someone you just met in a brand new game suddenly becomes a vamp in mid-sentence. I know it takes awhile for a person to complete their "turn" once bitten and I guess I just was the one to run into them before they had finished. It was quite a bummer for one of them to be Daren Dreamer! I so wanted him for a spouse. Instant artist! Now on still another game there and this time, while there still are vamps, (and will be unless I get rid of LN or September arrives with Supernatural), no one has just turned while interacting with my Sim twin. Then again, this time it's not a dynasty, just game play.