Well, I had a couple of reasons for turning them normal. Vampires on their own don't always take good care of themselves. They say outside too long and don't feed themselves right. I was afraid they wouldn't survive their entire lifetime if they stayed vampires. Mustard is still a vampire, though. Plus, all of these kids are family oriented and I hope they'll have families of their own. By being vampires, it would almost guarantee that their kids will be vampires. If they are normal, there's at least a chance of normal Sims being born into the town.