Her Rogue (His & Hers #4 (His and Hers #4)
Charlotte Russell

Harriet Rutledge, the widowed Lady Dunstan, chafes under the strictures of the guardian of her young son and her mother-in-law. Though she must tread carefully where they are concerned, she agrees to help her old friend. However, under no circumstances will she pretend to be courted by him. Harriet suggests a different ruse to enable Ben to find what he seeks.
Amidst late-night searches, the two discover unfettered passion, and perhaps something more. But for Hattie, the risk of loving a young rogue comes with a steep price. Ben is willing to make sacrifices for his lady’s heart, but can he prove to Hattie that the cost of love is always worthwhile—when shared?