Finkelhor addresses that in part:
A second argument rejects adult-child sexuality because it entails a premature sexualization of the child. From this point of view, childhood should be a time of relative immunity from sex, where a child enjoys freedom from an often problematic aspect of life. When adults approach children sexually, they draw them into a world for which children are not yet ready. Unfortunately for this argument, children are sexual. Most children are curious about sex. Many explore sexuality with one another. There is increasing professional and scientific agreement that sexual interest and activity among children is healthy and perhaps even salutary to later sexual functioning (Yates, 1978). This argument seems inadequate also.
Look up the Rind et al. controversy controversy in Wikipedia.
The authors\' stated goal was \"...to address the question: In the population of persons with a history of CSA [child sexual abuse], does this experience cause intense psychological harm on a widespread basis for both genders?\" Some of the authors\' more controversial conclusions were that child sexual abuse does not necessarily cause intense, pervasive harm to the child;[3] that the reason the current view of child sexual abuse was not substantiated by their empirical scrutiny was because the construct of CSA was questionably valid; and that the occurrence of psychological damage depends on whether the encounter was consensual or not.
Furthermore, your examples were of generational incest, which involve a high level of direct power over the child in that the adult is in control of so many other aspects of the child\'s life from where she lives to what she eats to what she wears and when she goes to bed. That leaves little room for free will to refuse.
I do find it interesting that you say that someone who was married three times was unable to have long-lasting relationships.