G C Scott 
Whipping Triangle [EPUB ebook] 

Rhonda, Paul and Muriel form a love triangle with a difference. They are drawn together by their love of sex with bondage, and live a curiously intertwined life-in and out of one another”s beds, now dominant and now submissive as the urge strikes them. Rhonda is the true dominant, relishing her control over the men and women she meets and takes into her circle. Paul finds himself attracted
to her as a mistress, and at the same time he is drawn to Muriel, the submissive bank manager who loves to be restrained and ravished. They all meet at Rhonda”s country house in order to fulfil their mutual desires for domination, submission, pain and pleasure