The Devil’s Own Dare by Alyssa Clarke (epub) Wagers and Wallflowers Book 12
Miss Harriet Thompson has her sights set on a viscount, but she knows she needs to up her game to secure his attention. Enter Noah, Darlington, the Earl of Warwick, a gentleman with a cunning plan. He proposes a devilish dare—he will teach Harriet the art of seduction, with the sole goal of winning the heart of her beloved viscount.
But as the lessons progress, the sizzling chemistry between Harriet and Noah proves too hard to resist, and they find themselves tangled in a passionate affair that could ruin their plans and reputations. Will they continue on their dangerous path or succumb to the irresistible pull they feel toward each other?