My alcohol addicted aunt is a member of the family. My parents and other relatives still stopped inviting and socializing with her because she was a mean drunk who got out of control whenever she was drunk. Still is, I presume.
As I said, I know that these dynamics are complex, that there are a lot of emotions involved and that it's never as simple as making the choice. But just because someone is a family member does not mean that we have to keep seeing and socializing with them. With the exception of a spouse, none of us can choose our family members but we can certainly choose if we want to keep them in our lives.
Unfortunately, that looks to be very much in line with how "high society" handles scandal. When the scandal breaks, keep the offender out of the public eye then wait as the world moves on and slowly ease them back into things.
I don't believe there is an age of consent in Germany either and it's not the biggest issue for me. For me, the biggest issue is that a) the girl was only a few years older than his own daughter, so that's yucky, and b) the girl was trafficked. Who thinks it's okay to have sexual relations of any nature with a trafficked girl? And how much consent can a trafficked girl really give?