Too Good for Men by Arthur Adlon

From one of the strangest marriages of all time, Lili plunged into a heavenly hell of violent ecstasy.

From the back:

'Lili was all woman - lush, voluptuous, ripe, and born to be loved.

But her husband couldn't satisfy her passionate demands and those of his insatiable mistress as well.

And so Lil found herself drifting - drifting into the kind of relationship she'd never have dreamed of before her marriage started to go wrong. She began to learn the rapturous delights to be found in the arms - and bed - of another woman.

In her new-found ecstasy, she couldn't guess that this was all part of a monstrous, evil plot - and that whatever road she eventually chose would be fraught with hidden perils as well as indecribable pleasures!'