Music in the night - Virginia Andrews

For Laura Logan, life on Cape Cod with her beloved twin brother, Cary, has been nearly perfect. Until the vicious rumours begin at school - cruel voices saying unspeakable things about the Logans. Not until handsome, gentle Robert Royce moves to town does Laura feel truly carefree and happy again. But while his smile is driving the shadows from Laura's heart, she still worries about Cary, whose gloomy moods drift in like the coastal fog.
And when the dark thunderclouds that have been gathering on the horizon suddenly burst with tragedy, they howl a name from the Logan's shameful past and Laura is plunged into a silent, terrible agony. Now she can only dream of the warm, sun-filled life she so desperately desires...