My little sister was molested by my older sisters husband when she was 10 years old. He touched and put his fingers in her vagina every night she slept over her house. Little sis never told a soul until 10 years later. Nothing was done for some reason. Fast forward to now older sis is now divorced for 5 yrs now 2 girls 17 yr old and 11 yr old. 17 year old said her dad showered her until she was in 7th grade 12 yrs old and wash her private parts. Now, she doesn’t want to visit her dad it’s been 2 years not visiting. Now, my 11 yr old niece hides and is scared when her dad picks her up says he hits her at times and they watch scary movies and is mean. But never said she’s been touched.

My sister the one that was molested wants to do something about it like call the authorities report him. What do I do she’s coming to me for advise but I don’t have proof of anything. Help!