This concern is exactly what the abuser is counting on, it is what gives them control. And I understand how you don't want to upset the family atmosphere, but you truely have to consider that if you do not tell, you are allowing not only yourself but your siblings to accept abuse. I am telling you, the sexual abuse WILL escalate and if it does you are risking the chances your siblings will become victims too. It is so wrong to allow them to think that it is better to stay quiet.

As far as your mother is concerned, I stayed quiet as well growing up, and only recently I told my mother after years and years. Mothers don't know and when they find out they are horrified and feel guilty, they suffer too. So you have to step out of being a victim of abuse. You cannot let this happen even one more time, it is truely wrong. Your father is mentally ill and he is getting satisfaction out of the abuse, WRONG.

You can talk to your siblings, but do not choose to remain victims as fear, don't convince them to keep some kind of silence pact. Because that is only agreeing to all becoming victims and learning how to be trapped and have a victim mentality.

I understand how you feel confused and powerless, and the fear of telling.
But you must truely understand, that is exactly what abusers put in place,
even if you don't think they are purposely controlling, they are. And that is truely not healthy for the family.

Open Eyes