Originally Posted by
Thraendil
Actually, I think we've all gotten her story really really wrong, and that her story arc actually might turn out to be quite "beautiful" and "touching" even.
I think she meant to say something like: "we can't even choose who we see in our afterlife".
Most likely, this goes back to her suicide after WotLK. She went straight to the maw, and probably expected to see a love interest we don't know about, or perhaps a family member or something similar. Instead, she only experienced suffering and darkness. Her first thought when the Val'kyrs brought her back must've been something like: "I would rather see this cycle break than to spend an eternity without this special person".
Ever since, she has probably plotted a way to "break the cycle" (her own words), so that she may be reunited with this person. I don't think it's Nathanos she's thinking about. Her dealings with the Val'kyrs was not to get an eternal life as to escape the maw, but rather to buy time to finish the job.
It's quite fascinating really. She would rather break the whole world, and the afterlife, to be reunited. Isn't that one epic love story? I don't think this is meant to be some sort of "redemption", just an explanation of her motives that actually makes sense.