It's hard to believe that things had been going so well only an hour ago. Between Potter's saccharine declarations and Albus' scheming expression (not to mention Fudge's general...being) the whole damned thing appears to have been lost.
Now, Severus isn't one to put all his eggs in one basket – and he never bets on anything other than a sure thing (well, not since he became a spy at any rate) but he's developed a sort of social second sight, as it were. And today all signs point to 'Suck It Snivellus'.
Black seems to have been suffering at least. Sallow and emaciated with an empty expression – Severus doesn't know how any of the idiots here are fooling themselves into believing he feels anything towards them. It isn't even anger dulling his features; Severus knows what Black looks like angry. (He ignores that he knows what Black looks like cruel as well, manipulative, dark. He's seen these things on the teenager he once was and he isn't seeing any of them now. Only emptiness.)
No, Black's just a good liar. That's what this is. That's all this is. He's probably laughing at them right now.
At the corner of his eye Severus thinks he sees a flash of red hair coming closer to him – probably a Weasley, no matter that there are none in here with him – he doesn't need to think about what Lily would say if she were here; it doesn't matter. Lily is perfectly capable of picking friends who would betray her.
He and Black are both proof of that.