This was perfect: He should have been less surprised when he was hit with a blast of hearts worthy of a fire-hose. He should have been less surprised when Regulus stood, reached for his hand, and pulled him up, hands pressing into his back, Regulus burning into him. Lips brushed against his, and all Severus could do was stand there and smile stupidly. That entire scene was perfect, but that paragraph was the very core of it.
The end, the quick review of Reg's betrayal of the Dark Lord, coupled with his very casual leave-taking of his lover just about killed me. *hugs your brain*