The Sex Sisters: A Diary by William Seeds

Polly arrived in Hollywood first - beautiful, brunette and fantastically sexual. She set things up for Esther, her younger sister, Both girls were into a freaky kind of sex, a no-holds-barred scene that would further their careers and, at the same time, prove to be a problem in their lives.

Nothing was beyond them, Lesbianism, group sex, spanking, heavy s/m - the sisters had seen and done it all, and were more than willing to see and do it all again.