Never Have I Ever With a Duke by Darcy Burke

Graham Kinsley is shocked when he inherits a debt-ridden dukedom, and now he has just one month to repay a loan. He needs an heiress—or find a way to recoup the former duke’s losses. When he meets the alluring Arabella, he’s entranced. Unfortunately, she’s as bankrupt as he is, but if they work together they may be able to recover their fortunes. Though if they keep stealing kisses, they may lose their hearts instead.
Arabella Stoke can’t afford an attraction to the penniless duke who has vowed to help rescue her family from financial devastation. She needs to find a wealthy husband before her father succumbs to the stress of losing everything. However, as Graham brings them closer to finding the swindler who stole their money, the war between what they want and what they need may ruin them both.