Caithrine gulped and took a step back. Sam stood, "Caithrine, there's something you're not telling us."
"If – If you look, it's in your blood too," she stuttered sounding scared.
"Maybe, but it sure as hell isn't in Dean's blood, so that means…"
"I can explain," she sounded frightened.
"But your not old enough," Sam thought over the facts, "And I'm willing to bet that the amount in your blood is not near as high as the amount in mine."
"Sam – "
All of a sudden Sam reached out to take Caithrine's bag, which he ahd barely noticed she was hugging tighter and tighter with each step he took. She tried to stop him, to throw a punch, but he got her in the stomach and she dropped the bag. It's contents spilled on the floor. Among them was a flask engraved with a devil's trap and her name.
Sam picked it up, "I'm also willing to bet that this isn't filled with alcohol," Sam growled. He unscrewed the lid and tapped some of the liquid into his palm, holding his breath. Out spilled a stick, thick red liquid that Sam knew instantly, "Dean take this," he said holding the flask out to him, "Now! I can't have it around me," Sam turned, and went quickly to the sink, washing his hands thoroughly with rubbing alcohol, trying to get it off all of it, even get rid of the smell.
"Well, well, well," Dean said in husky tone leaning down over Caithrine, "It looks like you left out an important part of the story."
Dean stood up and started circling her. He out the lid back on the flask, "this is a neat little thing," He said turning to her so she could see the engraving, "Ironic though that you'd have a devil's trap on a container of Demon blood. Who gave it too you?"
"Anna engraved it for me," Caithrine said, trying to sound strong.
Dean stopped, "Anna?"
She nodded.
"How the hell'd you know Anna?"
'She came to me. About a year ago. After I was attacked by other Angels. She took me as a gift, and an apology for her siblings' actions, to get that engraved."
Dean started to ask another question but Sam cut him off, walking back with a towel in his hands, "You still haven't told us who gave it to you."
Caithrine swallowed and breathed deeply, "Who gave it to you, Caithrine?" Sam said slowly.
"Who gave you the damn vile?" He shouted, throwing the towel.
"Ruby."