You had joined dean and Sam on the road a few months back so they could keep an eye out for you- make sure you were safe. Of course, their plan didn't work exactly. They had left you one night to work on a hunt- which they insisted you couldn't join. Long story short, you had been bitten by a vampire- and now you yourself were a vampire.

you'd been able to hide it for a while but in recent days, you'd been exposed. The three of you were on a hunt, about to kill a demon- when the demon outed you to them, asking how you'd dare side with humans. Sam and dean had been shocked and have been quiet since- unsure if they should keep you with them, as you could be a danger to them.

since you didn't want to kill, but you still needed blood, you'd had to get your own blood. You were sat on the bathroom floor, a few blood stains around your mouth, your arm practically dripping blood. Dean had gotten out of bed to go to the toilet but he paused when he saw you- stopping in the doorway and sighing a little, his expression soft, watching you- his mouth ajar as he took in the sight.