Can't write C/E conversation

Making very heavy weather of writing a single page (~500 words) of Christine/Erik interaction -- how on earth do people write entire epics of these two shut up together, and how am I going to manage several chapters of it? :-(

I seem to remember having this trouble with "Blue Remembered Hills"; after two or three chapters of Erik's view on Cris and then Cris's view on Erik, I just couldn't think of any fresh reaction for them to have towards one another, and had to resort to writing the final scene from Rall's viewpoint instead after running out of viewpoint for Cris :-P

What amuses me is that the conversation immediately picks up when they start talking about Raoul... heavens above, I really do have a one-track subconscious, don't I? It's very odd, because I'm certainly not fixated on him the way the fangirls are on their Erik; it's just that that seems to be where my ideas come from.