<human>: If there's a better subreddit for legal advice, please point it out to me.

My friend's 14 year old sister, who has been going through therapy for having psycho tendencies, has suddenly accused everyone in her family of molesting her.  My friend, we'll call him Josh, she's accused of raping her many times, she's accused her dad of molesting and raping her, and she accused her mom of touching her and neglect and physical abuse. The entire family is outraged and they've separated the family and barred contact. She's absolutely lying and has no regards for the legal trouble shes getting everybody into.

What can they do? What can I do as a bystander? What would go on their permanent record?

Give me the gist of the text in a nutshell
<bot>: Friend's sister accused her entire family of rape and abuse, all out of lying desperation. What can he or I do to avoid them going to prison?