My 5 year old stepdaughter is constantly being mean and disrespectful. She will be like your ugly, your stupid, your lazy etc. My partner doesn’t think it’s a problem and thinks I need to stop being so sensitive because she’s only 5. When she says these things she faces no discipline for it. Maybe I’m wrong but none of my friends allow their children to talk like that. Should I just let it go? Or am I right in finding it unacceptable and disrespectful?