The pilot starts with them getting into a boat together, acting more like a romantic couple than siblings.
He rationalizes this by thinking that, since he still exists, the people he had thought were his grandparents must not have been.
However, when their relationship is threatened by Jack's new girlfriend Kathleen and her two sons, Rose goes to extreme lengths to get rid of the new family and be with her father, even sharing a kiss with her father when he is asleep.
Not anymore; today I am a bitter woman; full of regrets and nursing pangs of resentment against my daughter.