Grace Livingston Hill 
White Orchids 

Camilla Chrystie was losing hope. She’d had an accident while rushing to get medicine for her beloved mother, who was dangerously ill. Then, miraculously, a handsome and wealthy playboy had offered Camilla his help. But when they had joined together in a desperate effort to save Camilla’s mother, they had found themselves drawn into a friendship that surprised them both.
Touched and warmed by their time together, Camilla is soon caught in yet another dilemma. Should she trust the man’s solemn words of friendship—and love—even though he had returned to his world of wealth and seemingly forgotten about her completely? Was what they shared real, or is she being foolish to believe his assertion that they could find a true and lasting love together?