I thought all vampires can just come in, especially if it is the night time attack! Funny thing that happened last night was that I added the 3 noble and rebellious vampires to Forgotten Hollow and my sim was turned my Caleb when he came over as the only welcome wagon! I am using my autonomous turning mod and it worked flawlessly :) So the night my sim was turning he slept and suddenly the noble female vampire with the yellow dress came by and wanted to sneak in, she mesmerized my sim and they walked outside.
As she was approaching him for the bite he suddenly turned and she stopped in her way and giggled XD LMAO! Problem is, my sim stayed mesmerized and dazed, and the stupid sound that comes with it kept going. So I left to the night club and as I returned home the dazed sound started fading away. This was a very weird encounter :D She almost drunk from him before he turned.