Jim Bob and Michelle need to banish Josh from the family. He poses a grave danger to them all.
He has a deep seated sexual problem that he obviously can't control. I don't know if he's a pedophile, a sex addict, a porn addict, or all of the above.
The path that Josh is on is very dark and dangerous. The family has already suffered public humiliation, molestation, and financial loss due to Josh's problems.
Jim Bob and Michelle need to cut him loose in order to protect themselves and the rest of the family, especially Anna and her children.