Darcy and Fitzwilliam

the long version

"Colonel Fitzwilliam is a military hero whose devil-may-care personality hides the torments within, until he finds himself in a passionate, whirlwind affair with a beautiful widow who won't hear of his honorable intentions. Cousins, best friends, and sparring partners, Darcy and Fitzwilliam have always been there for each other. So it's no surprise when the only one who can help Darcy fix his botched marriage proposals is Fitzwilliam, and the only one who can pull Fitzwilliam out of an increasingly dangerous entanglement is Darcy"--From publisher description.