The Long Wait — Patricia Robins

Allerton Manor was the only home Tammy had ever known - and the Allerton family treated her as their own. But when she realised that her love for Dick Allerton had changed from the careless affection of childhood to the mature love of a woman, she was heartbroken when Dick still treated her as his little sister. When the final blow fell, and she thought she had lost not only Dick, but the only other thing that made her life bearable, she was in despair.