Please take a look at websites like NOTA (National Organiation for Treatment of Abusers) and its American counterpart ATSA (Assioiation for the Treatment of Sexual Abusers) and NSPCC where you will see reference to lots of research, academic papers, upcoming conferences, books, treatment manuals, specialist areas like child on child abuse, adolescent sex offenders and much, much more. This work has been going on for many decades and the UK is one of the leaders in understanding, preventing, assessing and treating sex offenders. We collaborate with this work around the world.
Wives and daughters are not always suspicious that child abuse is being perpetrated, although they might suspect infidelity or disapprove of the man's sexist, violent or other behaviour. Some wives deny anything could have happened, even when they are given details. As on here, there is a mixed response, especially when we learn that a child has been harmed - what does that say about us as individuals and as a society that we 'let' this happen? What does it say about a wife, if she has chosen to live with a man who she now knows has sexually abused children? The wives and families I have met range from being ready to murder him, to staying loyal but not condoning what he did, to outright collusion to help him escape conviction. Just like many other crimes, opinions differ.