step kids are disrespectful

Elizabeth

I'm past my breaking point with dealing with my SO two children, they are 11 and 8, every day literally we talk to the 8 year old about her mouth and her attitude towards me but nothing works, the 11 year old is just straight up disrespectful and a huge brat... me and my SO have been together for a year so this isn't a new relationship, I have talked to there mothrr, but she doesn't do anything about it, and my SO doesn't make the 11 year old do chores or anything but has his 8 year old and my child do chores all the time, I'm tired of trying and tired of having this conversation with my SO every couple weeks... idk what do, I'm 11 weeks pregnant and I'm so stressed all the time and just over his kids, he likes to be there friend not there parent any advice? my relationship is counting on it