I have experienced first hand families where sexual abuse occurs and then they deny it to the bitter end or blame it on the victim. If someone speaks up about it, they pretend nothing ever happened. I've actually seen this as a repeating pattern among the generations of a family... and of course the silence allows the cycle to continue.
This didn't happen in my own family of origin, but I have experienced it personally through my in-laws and I have met others who have seen the same things. Heck, I had several friends growing up who were molested and abused by family members. I have learned to recognise the emotional scars these people carry.
As for me, I'm like a hawk when it comes to things like this... I have my eyes open all the time and I won't hesitate to blow the whistle if I see something is wrong. He has never given me any reason to worry, but the Mister knows if he did, I would disembowel him in a heartbeat.
It doesn't make me popular in some circles, but I'm like the kid in The Emperor's New Clothes. I call it like I see it, because someone has to.