If There Be Thorns by Virginia Andrews
From the author of Flowers in the Attic comes Book Three of the internationally bestselling Dollanganger family saga.
The family was now living as far as possible from the haunting scenes of their past, and, in the sunshine and joy of their new life, with the children and their shared love, they tried to forget the anguish of their loveless inheritance.
But the hidden secrets of the past rose up to trouble them. Their parents' dark heritage began to haunt them once more. The rage and hatred they felt returned to torment and twist the new generation. Only if they could forgive their mother and forgo their final revenge could they at last find the peace they so desperately sought.