It was too good to be true. Dean couldn't believe it - Jo. Jo who he'd seen just months ago get ripped apart by hellhounds and who died with her mom, in her mom's arms, blowing them all up. Both of whom he'd been mourning for months. To win. To beat Lucifer and save Sam and stop the apocalypse and - and maybe they accomplished that, a little. But Sam was gone.
Although it was only a few steps down the hall from his own room, it took Dean ages to get over there. He had to prepare - not just mentally, though that was the bulk of preparation. No, he had to make his own holy water and make sure he had a silver knife. He had the demon knife on him too, just in case.
He made his way to her room, lifting his hand to knock on the door - and didn't. His hand hovered there for a moment, hesitating, before he used a single knuckle to knock. As soon as the door was opened, he used the flask of home brewed holy water, right on her face.
"Sorry, had to check."