Whenever she's at home, all she does is sit in my room and eat bread.
No joke. It seriously creeps me out.
*Walk into room*
>"Honor to you, my Thane"
>OH JESUS SWEET MOTHER forget
Oh by the way, How do i not become a vampire during the dawnguard series? i want to kill vampires not help them.
The Dawnguard questline starts you out in the actual Dawnguard, and then you have to either join the vampires or leave the castle when you take Serena there.
Then you get the choice of either joining the Volkihar or the Dawnguard.
As for not catching the disease, a potent Cure Disease potion can be made from Charred Skeever Hide, Mudcrab Chitin, and Vampire Dust. If you can't make it to the nearest chapel in three days' time, which in Skyrim is impossible as even a trip from Riften to Markarth takes a day and a half.
That was way more information than you wanted. Sorry.