Cade's Dare (Crime Tells #5)
Jory Strong

A future that doesn’t include sharing Grace makes Cade break out in a cold sweat. Desperation makes him issue a challenge. Take her with me once, I dare you.
Mace has every intention of refusing, but one look at Grace after a night spent with Cade and there’s no way he can deny himself, not when he’s craved her sweet submission for years. He’ll take Cade’s dare, gambling he can survive the misery that’ll come afterward—when he walks away for his brother’s sake.