Contractually Yours by Nadia Lee

Jewelry heiress Lucienne Peery needs a husband in order to take full control of her company and arranges for a mutually beneficial marriage. When she catches her fiancé in bed with her sister, she demands to marry his older brother instead. And his family agrees, in order to avoid handing over 30% of their own company for breaking the marriage contract.
She only plans to stay married until her control is firmly established. But she does the unthinkable and falls in love with her husband…
When the ruthless and iron-willed Sebastian Lasker is forced to marry a woman fully as scandalous as his embarrassing, disreputable father, he vows revenge. Nobody manipulates him and gets away with it. He’s going to strip her of what she wants from the marriage and get rid of her.
But pride and fortune aren’t the only things at stake as he realizes he can’t let her go…

Contractually Yours is full of a yummy arranged marriage, dislike-to-love, forced proximity, my wife moments, man-groveling and a happy ending.