Castiel watched, fascinated as she let go. He knew they could live for the rest of time, being together, and he would never get tird of watching her like that. Knowing that he was the one doing that to her.
It wasn't long before he felt able to let go himself, not holding back, knowing she was strong enough to take it. The final crashes of lightning streaked across the sky as he climaxed himself, groaning her name loudly.
The earth itself was trembling, shudders fading into aftershocks as he wrapped his arms around her, pulling her close, both to protect her from the dangers around them and just to feel her close to him as he kissed her.
"Happy anniversary?" He smirked almost cheekily before he laughed, feeling lighter than he had in weeks.