So yesterday, my mom and sister had this huge screaming match and it was definitely not like any other family argument. I guess my sister had revealed that my mom is pregnant. I told my mom that I didn't want more siblings so she does this behind my back? I know my dad is also responsible too. So right now, I'm just staying mute. I'm not talking to anyone. Am I overreacting or do I have a reason to be mad/angry?