I've seen two more episodes now, and so far they seem not to be going there. I suspect AU Olivia has some interest in keeping the romance from progressing too far, especially as she has a partner back home, but then again if it's required to keep her from blowing her cover, I'm sure she wouldn't hesitate. I hadn't even thought about OU Olivia and Frank, probably because that's not a pairing or characters I'm invested in, but that could end up being much the same situation. :\ I hope the writers have thought this through and don't get too icky with it.