Dear Sarah,
Every couple has a different way of arguing. Some disagree loudly, while others discuss their differences quietly or not at all. It is possible that your father and stepmother just have a style of arguing that you're not comfortable with because you're not used to it. However, if you're concerned about your brothers being physically or emotionally hurt, then you should take action. Talk to your dad about what you've noticed. Let him know that you're afraid of what will happen to your brothers. If you have trouble talking to your dad, be sure to discuss your concerns with your mom. She can then have a conversation with your dad about those fights. He might not realize the impact they're having on you and your brothers.