James Jennings 
Emily: Or, the Voluptuous Delights of a Once-Innocent Young Lady [EPUB ebook] 

'Emily: Or, the Voluptuous Delights of a Once-Innocent Young Lady' is centered on the tale of the erotic pursuits of a young English lady at the turn of the century. This book starts innocently enough, but has a believable realism and a stomach knotting ending.
A young Emily is forced to marry the foppish son of a wealthy landowner to supposedly save her parents from the poorhouse. After learning what she likes, Emily goes out of her way to find 'distractions'.