(Book 5 Arrow/Spn xover) Family Is Who You'll Kill For

Those Who Fail To Learn From History...

"Sam? Let go."

He felt a slight tug as her words brought his attention to what was in his hands, it was the keyboard. He had set it down but still had his hand resting on it while she was talking and there were very definite creaks and groans coming from where his fingers had wrapped around the edges.

"Sorry. Let me give Dean the food I made for him and we can set the rest of this up."

"Think I can go with you and say hi? Or..."

"He'd probably appreciate it, c'mon."

She carried the glass of water and cup of coffee while he grabbed the plate of food, silverware and a tray. A few moments later they were in the master bedroom, Dean had shifted into a sitting position and was staring out the sliding glass door.

"Hi," Felicity said and to Sam's relief when Dean turned his head there was a genuine smile on his face, although it didn't quite reach his eyes.

"Hi. You're a lot hotter than my usual nurse," Dean remarked as he pointed at Sam.

"I wouldn't go that far, I think he has better hair."

"Yeah, but you have better curves," Dean said with a slight wink. Felicity snickered and placed the cups she was carrying on the night stand next to Dean while he handed the tray of food to his brother. He's trying, but there's nothing in his eyes. As he took a step back after Dean took the tray from him Dean glanced at Felicity again then up at him, Is that hate? Jealousy? What? It was so brief he wasn't sure he'd even seen anything till more than a hint of revulsion replaced the emptiness in Dean's eyes. It was. Why wasn't he like this before? He was violent but it wasn't directed at me.

"You staying for awhile?" Dean asked.

"I'm setting up a network in the media room for Sam to use. Do you want a computer in here?"

"No, you can't watch porn on it," Sam added, although he wasn't quite sure where that thought came from.

Dean rolled his eyes, "Spoilsport." Then what little forced humor there was on his face left as quickly as it'd come. "Find anything yet?"

Felicity glanced at Sam, obviously not sure if it'd be a wise idea to tell him.

"So yes. Well?"

"Give us a few hours.," he stopped himself. "No, you know what. I'm not playing this like that. Yeah she did."

"It's not verified yet though," Felicity hastened to add.

Dean set his coffee down, "Okay. So?"

"She found some translations from a partial scroll. It's Lucifer Dean, it's what he built into the Mark."

"We know it's Lucifer Sam,"

"No, not like this. The Mark turns brother against brother."

Dean started to shrug but stopped, "You're not talking in the general sense are you?"

"No, Lucifer was jealous that Cain cared so much about Abel that he sacrificed himself, the Mark looks for brothers who are extremely close to each other. Lucifer designed the Mark to twist those bonds around, make them hate each other instead."

The color started to drain from Dean's face at the same time his eyes grew even sharper. Sam could see connections being made as that one piece of information seemed to hit Dean much harder than it hit him.

"Son of a bitch. Let me guess, the stronger the bond, once it breaks the stronger the Mark gets."

"Of course."