I'm tying to estimate your age B108791, would I be correct saying 15>>16? if so, I think you might be taking that much on here with your sister,t can get to the point can also effect you, I gather from Mam's post the Issues your sister was / is having, It seems to me that family life / arguments / fights are effecting her in a metal way! am I right? regards the Molesting, is this a family member? if so you need to contact the Police, Head of School, Social Services & explain the issues, I hope you take heed of other peoples answers / response, do this as quick as you can as this can lead to very serious outcome.