It's about my family

Me and my sister feel like my mom and step dad doesn't recognised us as a daughter instead just a live in maid. We do all the household and even take care of everything they need and their son. Their son really disrespect us especially me. And sometimes they do something about it but sometimes they just act like they dont hear it. I don't know what to do. I can't even open it up with my mom. And i'm scared that i might start hating them. Hope somebody will give me advice

AYA14 sounds like some family counciling is what you may need. If your mom or step dad don't want to listen to you or sister then that might be an option.