Lucifer's expression mirrored Gabriel's. He didn't like Crowley any more than Gabriel did. If anything, he might have disliked him even more. "Crowley's looking out for Crowley," he said, "and that means that he's willing to throw anyone to the wolves if it means gaining an advantage. With me, with anyone."
Crowley was working behind his back to double-cross him, he was sure. The King of Hell would never bow before the Devil himself, no matter how Lucifer tried to break him. There was always going to be a part of Crowley that would slither away and try to find the advantage. Crowley was simply waiting for the opportunity.
"But knowing that about Crowley, little brother, knowing that..."
He closed the gap between them, stepping in close to Gabriel and lowering his voice as if he was concerned about being overheard.
"You could just tell me he's lying," he said quietly. Castiel's big, earnest blue eyes were perfect for the expression he had, pleading with Gabriel to prove Crowley wrong. "You could just tell me that he's screwing with me."