Dean felt the wave of love and comfort and knew without a doubt it was from Castiel and not Lucifer. One he didn't even think Lucifer was capable of those feelings let alone trying to convince him of them. No, feeling that made it all the more easier to accept what was happening on some levels and harder on others.

As Cas predicted...Dean felt the comfort but also the bittersweet betrayal of Cas refusing to evict Lucifer from his vessel. Dean did not think any of what was happening was worth his angels life. He knew they could figure it out without the fallen angels help. Somehow, they would work it out. But instead he was being forced to the edge of oblivion by a creature who hated him to his core. He couldn't stop his orgasm from washing over him at the feeling of Lucifer/Cas spilling inside of him. He gasped out, body shaking and clenching tightly as his release swept him up in a flood of pleasure.