In A Storm of Swords 1, when Jaime Lannister and Roose Bolton meet in Harrenhal, the following conversation takes place (Jaime's PoV):
"I'm a captive here, not a guest. Your goat cut off my hand. If you think some prunes will make me overlook that, you're bloody well mistaken."
That took Roose Bolton aback. "Perhaps I am. Perhaps I ought to make a wedding gift of you to Edmure Tully... or strike your head off, as your sister did for Eddard Stark."
"I would not advise it. Casterly Rock has a long memory."
"A thousand leagues of mountain, sea, and bog lie between my walls and your rock. Lannister enmity means little to Bolton."
"Lannister friendship could mean much." Jaime thought he knew the game they were playing now. But does the wench know as well? He dare not look to see.
What does Jaime mean by 'knowing the game they are playing'? Does he mean the game of two enemies making some sort of deal that's advantageous to both sides (Bolton's motivations being exactly what he says they are later in the same conversation), or does he realise that
Bolton has sold out to the Lannisters (i.e. to Lord Tywin) and is planning to betray Robb Stark
? We've been led to believe, by Jaime's own PoV scenes and by Brienne, that Jaime wasn't a part of what I mentioned in the last spoiler-tag, but does this scene suggest that actually he did know about it before the Red Wedding?