Cas nodded. "My mate and I are what many angels consider to be walking blasphemies and the survival of fallen angels is prohibited. That aside, I also aided in preventing the end of days. That...did not please my superiors, to say the least. It is the price I pay."
He held no ill will towards his siblings for it. They had their orders and they chose to obey them, as far as he knew. They fought and he'd won. He'd often wondered when the day would come where he would fight them and lose, but it was of little import now.
"Why...do they wish to piss you off?" he asked in confusion.
In terms of returning, Cas wasn't certain how inevitable it was. He only hoped he could return with the few aspects of his existence that he held dear. The fact that Morpheus seemed to be choosing one he cared for...Cas could certainly relate to that. "Which god is this?" he asked, smiling faintly.