One pauses momentarily for the other, but only slightly. Usually you have a few interactions (between all 3), with the 3rd wheel being painted as harmless, then you have the main couple fall in love only to come upon hard times, which is when the 3rd wheel makes a timely appearance. I really really like the way QH is being handled. I have to say, after today's preview, I'm actually looking forward to Ayaan Zoya interactions. So many people have been saying they're so wrong for each other, but in that little clip I was very entertained. Its not going to be painful at all to watch Ayaan Zoya sequence.
Its very very interesting, the way they're developing this story.