I will try to post the refusal letter. She could probably stay for 3 weeks on her own income because her flight ticket is already booked both ways. She also has a contract of work to return to. That's two sound pieces of evidence that she will leave at the end of her stay. The refusal letter didn't actually say there was any doubt that she would leave; the problem was that there was no evidence that we'd met each other or that I was even a real person.
Yes, my family can also invite her; they've met her themselves. If we'd sent all the required evidence in the first place I've no doubt it would be accepted. My caution now is about complicating things too much by explaining to them why I think the first application was refused...
