My Lord, Lady, and Gentleman by Nicola Davidson

Estranged from his aristocratic family for choosing art over a third son’s proper path, Mr. Clayton Irving lives in wretched circumstances. His only joys are his friends and an extraordinary talent for sensual portraits, until the perfect opportunity arises: paint ton empress Lady Susanna Fenton. All his financial woes gone…if he can hide his fierce craving for her—and even more forbidden—her husband Lord Joseph Fenton.

In the eyes of the world the Fentons have it all: staggering wealth, position, and a caring union. Yet their smiles hide a marriage broken by secrets and pretense. The wicked portrait is a last effort to save it, and Susanna and Joseph soon discover that sinfully handsome Clayton is key to a passionate and happy new start for them all. But secrets always reveal themselves, and those who break the rules are punished. Can an unconventional ménage truly defy all for love?