Arrgh, I just can't take it... bawled my eyes out
I don't really think this is a spoiler, since the whole "Talisa is a spy" thing isn't in the books, but I'm about to talk about it, so shield your eyes.
I still think it's possible Talisa was a spy, and was just betrayed (although as I said before I don't think there's definitive proof either way and I don't see the point for her to have been a spy after this...who's going to know or care?). She was noticeably pregnant (and there was that big scene where Frey went on about what was under her robe...) and I really don't think Frey gave a crap about whether she was a spy or not... not to mention, if she
was a spy, she was a deliberate attempt by the Lannisters to break Robb's vow to marry Frey's daughter, so they weren't likely to reveal that to Frey.
At any rate, she was a symbol and she was carrying Robb's child and I think that was enough for such a vicious and vengeful person.
OK, I can't actually think of anything that happened before that scene. Did they really have to start talking about little Ned? Did they really have to have Catelyn discover the ruse, moments too late?
My heart, it breaks.