Tol-in-Gaurhoth XIX: Ang Sagang Daga, bow.

[Cailín]

spawn was under no real suspicion; she was writing lucid, smart posts; maybe they had pegged her as a Seer to boot; but I think she was killed for being a smart girl.

This seems more likely than the wolves trying to balance the sexes. They seem to have no reason to let the Lover live that long: they're with four and can afford a loss.

However, I somehow do believe they saw a Seer in Spawn. See my previous post.