Niall Horan's little twins

Niall Horan gets a beautiful Irish girl pregnent. This girl ends up dying during child birth and leaving Niall and the lads with the babies. Camillia and Cathrine are a gigantic handful, and when they wonder off one day after school, they run into something they read in story books, a vampire. They tell Niall and the boys but the boys don't believe them, when the girls turn 16 that particular vampire turns them and they have to try and find a way to keep this from their dad new mom and four uncles. The vampire that changed them gives them each a neckles that allows them to go out in day light. The boys find it strange when the girls start acting out a lot more then they used to. Follow the Horan twins in their family adventure.