Cas didn't feel it was amazing. He felt it was a start. Although Gabriel had removed the last of his physical need the addiction still occupied a large potion of his thoughts. It bothered him. Was it enough to drive him back? How much did his wants even matter?
When they kissed him, though, those concerned melted away and on that moment he could face anything. He held then both close, for a moment, just to feel them pressing against him.
When he finally let go he kept his gaze on Jo. He took her hand in his and stroked his thumb over it. "You two mean everything to me, you know that, right?" he said softly, his eyes looking deeply into Jo's.