A forgotten thing

Today, I wanted to asked Mum about a question while Mum was helping Peter to his homework. She didn't hear my question clearly so she shouted at me loudly and told me to go back into my room.
Dad heard that and asked Mum for the reason of shouting at me. Then Dad talked to me for a while. He told me that I shouldn't asked Mum when she is busy. I also have to speak clearly when I am talking to everyone. So this is my fault. I am so sorry and ashamed to annoy my Mum.