Strangers When We Married by Carla Cassidy

THE AGENT: Seth Greene, determined operative and estranged husband and father.
THE MISSION: Infiltrate his ex–wife's home and gain her much–needed expertise.
THE DEVASTATING DISCOVERY: Seth is still very much in love with his ex .

Their courtship was whirlwind, their marriage passionate and all too brief. For the only way Seth had been able to keep his young bride happy and their baby boy safe was to walk away. Now that his latest mission had him sharing a roof with lovely Meghan again, Seth knew his greatest challenge lay ahead. For how could he convince his long–lost bride that their love their life together was meant to be?

a year of loving dangerously
Where passion rules and nothing is what it seems .