Even though, if there was a God, He almost certainly didn't answer the prayers of vampires, Dean was praying Sam would stay quiet and out of this. It was definitely not a social call, whyever Eric was there and Dean knew he didn't have a hope of fighting him off if he took a notion to do either of them harm.

"Not now, Sam," he murmured back, watching Eric get to his feet. It struck him again how tall the man was. Same height as Sam.

He put on a smile and watched Eric brush imaginary dust from his shirt. A very human gesture done only to be irritating. Then he gave a half smile, eyeing Dean thoughtfully. "Hello, Dean. I just thought I'd drop by and see how my young charge was handling himself in the great, wide world on his own."

The blond man glanced around the motel room with obvious distaste and looked back to Dean. His gaze flickered to Sam and a more amused smile appeared when he noticed the marks on Sam's neck. "Well. I see that, after all your insistence you wouldn't drink human blood, you've finally found a flavor to your taste. Must be quite special if it's overcome your dislike for the practice." He tipped his head to get a better look and took a breath, trying to catch Sam's scent.

"He's mine." Dean answered back without a hint of amusement. The last thing he wanted was for Eric to get designs on Sam.