The Rules of Matrimony by Anneka R. Walker

Ian has vowed never to marry, steadfast in his resolve to shield himself from the heartache his father’s infidelity brought upon his mother. Instead, he dedicates his heart and soul to reforming criminal law with his Rebel group. A chance encounter in a country graveyard with the infuriatingly bold Miss Amie Tyler only solidifies his resolve to remain single. That is, until his life descends into chaos when rumors of his engagement—an engagement he had no part in or prior knowledge of—force him and the vexing Miss Tyler into a calculated marriage, a mutual scheme to protect Miss Tyler from her lecherous cousin and to save Ian from a political marriage he dreads.
Amie never imagined her unsophisticated life would lead to an entanglement with Lord Ian Reynolds. Living on her relatives’ charity, she is resigned to remaining a wallflower. But when her mother concocts a wild lie of her engagement to Lord Reynolds, she chooses to trust a gentleman she hardly knows with her future. Amie is thrust into a whirlwind marriage and is overwhelmed to find herself falling for Ian despite their agreement to maintain independence. As they navigate their charade, Ian’s political ambitions clash with his growing affection for Amie, and Amie’s courageous attempt to help Ian’s family heal threatens to unravel their bond. However, a forbidden kiss and unexpected acts of kindness kindle the spark between them that neither can ignore. In a desperate race against societal expectations, the two must decide whether a future together is worth breaking their earlier vows of independence.