Alice Perrin 
Star of India [EPUB ebook] 

Stella Carrington, young and beautiful, feels that life is passing her by in the repressed Victorian household of her grandmother and spinster aunts. A casual flirtation shocks and horrifies the elderly ladies, and they summon Robert Crayfield, her godfather, who is an officer in the Indian Civil Service, to make suitable arrangements for her to be a missionary or governess. But, tantalized by her beauty and disregarding the difference in their ages, he offers to marry her instead, scandalizing the village. (Goodreads)