Thorn. Castiel barely managed to suppress the shudder at the mention of... well, his alternate nephew he supposed. He knew well what Thorn was. And he made it his business to avoid him at all costs.
"My faith in the Lord, even during my time as a mortal, it was never shaken, not once," he admittd. "I love my Father. I always will. Faith in Lucifer though, my brother, that's another matter. He tore my family apart once, I won't see him do it again, I can't." He couldn't go through that much loss, not again.
He tensed slightly at the mention of Sam. "I understand it," he replied quietly. "I do. I may be an angel, but I'm not immune from the effects of jealousy. Not even over him." And he hated, oh how he hated knowing that they were talking again, even with his understanding of why. The knowledge that she was still so focused on Sam Winchester did cut deep, more deeply than Castiel cared to admit.