Sam/Ruby - Holy water!
It was when his hands were on her face, holding her, his eyes finding the demonic black that Ruby realised three things. One, she had never loved him more. Two, the room would potentially have seen what he'd done for her, how tight he'd held her, how close and familiar he was being with her now and three, This was a point in her favor over Dean. Hard won and accidental, and not worth it in the slightest but it was.
"I'll get the jacket. Thanks" she told him, lifting her hand and just for a moment putting her fingers to her lips before running them across his, finally calm enough that her eyes changed back to human. Before taking the oppertunity to leave the apartments with a glare at Dean as she went.
It had stung like a bitch, hurt deeper than anything since Alastair's razor, but it had had its uses, everything did if you knew what to do with it.