Baby, you can drive my car

I love my car. I love driving. My mind wanders freely and comes up with interesting ideas of all sorts. Ideas for new fics, for example. Last night, a perfect little scenario - inspired by a film I watched before - for Snape/Harry sprang to mind. Perfect, I thought, as soon as I'll arrive, I will write it down in a nice little ficlet that it promises to be. Unfortunately, the scenario wasn't entirely suited for Snape, who morphed into Lupin midway. And now I'm stuck: I really want to write the fic, but it starts out as Snarry and turns into Larry. I could change it, of course, but I'm very pleased with the dialogues as they are. What now? Write it nevertheless, cheerfully ignoring the fact that Snape behaves like Lupin? Include both, Snape and Lupin? Write two versions, one with Snape and one with Lupin?

*sighs*