Echoes in Stone by Kat Sheridan

A letter from the grave... Lily is dead. But a mysterious letter launches her half-sister, Jessa Palmer, on a harrowing journey into the wilds of Cornwall to rescue Lily's daughter from a tyrant of a father, a man who confessed to murder. Jessa follows in Lily's footsteps to a forbidding castle on the cliffs, but discovers the past will not stay dead at Tremayne Hall. Someone-or something-wants to ensure Jessa is no more successful at escaping than was Lily. A heart locked in stone... Bitter, brooding, and tragically scarred, Viscount Dashiell Tremayne believes Jessa is just like her manipulative, unfaithful half-sister. He's not about to let another treacherous woman into his home or into his heart. Particularly not a woman who's come to steal his daughter. Only one can win in the battle for a child's life. Then the accidents begin. A passion that threatens to consume them... Jessa wants only to take her niece and escape the grim manor. But Dash, fiercely protective of those he loves, gives up nothing that belongs to him. As the danger escalates, so does the heat between Jessa and Dash. Soon she'll have to make a choice: surrender the child to a man she cannot trust or surrender her heart to the same fires of passion that destroyed Lily.