Outback Doctor

The news that her childhood sweetheart Steve had fallen for an attractive newcomer during her period abroad came as a devastating blow to Sister Alison Parr. So the chance to do some immediate nursing work in Namboola Creek Hospital seemed like a godsend - until she realised that the new doctor was Gavin Cameron, the brother of the woman concerned. He clearly thought she'd led Steve on unfairly, but despite their hostilities Alison was grateful for the unexpected support Gavin provided in facing the local community. But was Gavin simply leading her on to keep things clear for his sister?
How could Alison tell?