All I have is my experience. One individual is my brother. He believes the sexual abuse of his brothers was normal response to his own sexual abuse. (Although he could not remember his csa, he was certain he had experienced it) The person he believes abused him, took pornographic pictures of me.
Did he do it more than once. Yes. Did he have any remorse or a sense of his doing something inappropriate, no.
The data seems to suggest that one third of individuals who are abused will abuse. This is heavily dominated with physical abuse victims so may not be accurate for sexual abuse victims. However, there are a variety of parallel results in the behaviors of physical and sexual abuse victims.
The higher incidence of drug and alcohol abuse, the increased vulnerability of physically abuse to also be sexually abused, behavior of control through manipulation and violence.