By the way, your dad probably stopped beating your mom because if he didn't she would leave him.
Did she used to threaten that she would leave, when he beat her?
What your dad and mom are doing is illegal, where i'm from. You haven't included where you're from, and so in order to help you properly, i'd have to know that. It's important that you are not told to do something that can backfire and be worse for you, than it already is.
Can you tell us where you're from? and whether your family, like your Aunts and Uncles treat their children the same way?
I'm really sorry this is happening to you and your siblings. As far as this guy, he was using you and I'm glad you did nothing more than flash him. Please stay away from any boy at this time. You have bigger problems to deal with, and often if a girl is being abused at home, she will have a target on her back and attract the wrong type of guys. On the other hand, a good boy that will be a good man might be out there to be a friend. A person that truly wants to help you deal with what you're dealing with at home, will not need you to flash them to be your friend. You need good friends, to become your family. and leave this family of origin behind, when you're old enough.Maybe your sister is old enough now to find her own way in the world. She needs mentors, as do you. You could let your sister know about Medhelp,so that she can find a support group, just as you have.
AND YOU HAVE FOUND A SUPPORT GROUP. If you need to talk, please feel free to message me. I've gone through what you're going through. And it stinks. But this is not your life, it is only you being is survival mode until you get to be on your own, and create your own destiny.
If you want to talk, i'm here for you. My name is Liz.
^ good advice above.
Regarding the home scene: If you don't feel comfortable talking w/ a teacher or the principal, ask the school nurse or a counselor, you can always talk w/ them about the abuse at home, but be aware that they will have to notify the local police ~ by law they have to because you're a minor. The local law enforcement would then have to become involved, and Child Protective Services...
The ex-boyfriend was sexually harassing you and sexually assaulting you in class; if he starts messing w/ you again, talk to your teacher after class (alone, when nobody else is around). Ask if you can have your desk moved away from his also! If things get worse, ask to be transferred out of that class to another, or better yet have him moved elsewhere...
Both situations are/were definitely abuse. Your ex was sexual abuse, somewhat verging toward emotional. At the least, your home situation is physical abuse and I would suspect some emotional abuse. Even yelling in front of your children is frowned upon, so you can bet the fact you've seen physical altercations between your parents, things are not good
Is there an adult at school you can talk to? Any bruises from the abuse by your parents you can show a doctor? You need out of the home situation.