The Adultery Club by Stimson
The Adultery Club: In an often grey world there are fifty shades of seduction.
A wife, a husband, a mistress. Whose side will you be on?
Life couldn't be happier for Nicholas Lyon, a divorce lawyer and contented husband of the beautiful Mal, a successful cookery writer and mother to their three gorgeous daughters.
And then Sara Kaplan, a bright, vivacious young lawyer, explodes into his life like a sexual hand grenade. At first stunned and horrified by the extent of his attraction to her, a catastrophic event soon forces Nicholas to recognize his own mortality and throw caution to the wind.
For Sara, what started as a harmless fling swiftly deepens into a painful battle for Nicholas's heart with Mal, who is not quite as preoccupied in her world of food and school runs as Nicholas had believed. But as Mal faces temptations of her own, she realizes she has to decide what she wants - and whether it's worth fighting for.