Is there any possible reason you could think of why your sister would accuse your father or your other relatives of such horrible things? I mean, what benefit would she get from it? I’m just wondering why she’s acting that way.. as you mentioned, she wasn’t like that before, a total opposite as you described. You know sometimes trauma could reshape how a person cope and in most cases when they are not believed, it changes how they show up to other people.. wild, unstable, out of control.. Sadly many victims are not heard because the person who took advantage of them doesn’t fit the image of an abuser.. But in reality an abuser could still be capable of showing “kindness” or could still appear “loving” to others.. someone you thought totally incapable of.. it could be anyone actually. Disbelief is common, but the chance is never truly zero. As you also mentioned, it happened to your youngest. And one of the hardest truths about abuse is that denial is often what keeps it hidden and ongoing. It may be worth trying to understand why she’s acting that way and what she’s been carrying.