i only wish the source material were as hot as it is fun.
That was you? I think I read that one. I had kind of the same reaction to it that misterandersen had to my Diana/Lois/Clark - it seems like... not exactly cheating if no one's dating at the time, but still a betrayal for the two of them to start anything without at least Barbara's express permission, if not her instigation. You can kind of hear the bow-chicka-wow music when the third party shows up and just joins in instead of being all hurt. (Which reminds me, I really need to write that slightly-more-emotionally-plausible sequel I was planning. >.>)
Now Dick/Kory/Babs, that would be weird.
petronellepulled it off once, mostly. It reads a little forced to me but, given the premise, astoundingly plausible really, and successfully navigates Babs being pissed off and resentful of Kory without either Kory or Babs looking like a douche (I think Dick kind of does, but at least he's well-meaning), which is a hell of a trick.