The Westmere Legacy

Isabella's grandfather, the Earl of Westmere, insists she take a husband - and she must choose which of her four second cousins it must be. In desperation, Bella turns to Robert Huntley, the cousin with whom she's shared many a childhood adventure. A distinguished captain of the Hussars, Robert finds himself agreeing to her outrageous suggestion of a pretend engagement. He tells Bella he has no desire to be shackled in a loveless marriage, and their engagement must end once she's had a Season in town.
Why, then, is he tantalized by thoughts of Bella, and the pleasures their marriage could bring them both?