Not that it matters, but what are the ages involved here. You seem to be a reasonable, mature person, and I'm guessing she's not like 18. If she's indeed a grown-up, the parents have to understand that at some point she has to do what makes her happy. She has to live her own life. At the very least, you'll know the answer to the "what if". That in itself is a question that I will ask myself for a very long time, and it's not always a good place to be.