John D. MacDonald 
Contrary Pleasure [EPUB ebook] 

For years the Delevan family image reflected only the best of everything — wealth, position, influence, and the kind of expensive good looks that take generations to cultivate. No one dared suspect that their glittering fa ade, their cherished privacy masked hidden lusts, furtive pleasures and twisted dreams that would soon erupt into a pattern of strange violence that threatened to destroy them all.