Same thing happened to someone I went to HS with. Her father had molested her for years. When she finally had the strength to tell a teacher, dad was arrested, spent a few years in jail and then returned to the home. He couldn’t live in the same home as the girl and so mom told her she had to find another place to live. She was about 15/16 at the time. She ended up living with a teacher’s family until she went to college. There were still 2 younger daughters in the family. I still cannot believe the mother took the father’s side.
The son of my H’s coworker was abused by his father during his visits to him (parents were divorced). Video taped it and everything. He only served a few years. And just this summer, while we were on vacation, we found out that someone down the road had coerced her 16 year old son into having sex with his 6 year old half sister and mom taped it. A neighbor’s kid saw part of the tape, stole it and it was given to the State Police the next day. Mom and son were both arrested. We were shocked as this kid had been at our house more than once, went to school with my youngest son.
Unfortunately, even biological parents do terrible things to their kids. Our children are the most vulnerable beings and some people take advantage of that. It’s sickening.