Advice,please no negative comment r opinions

I need some serious advice my 9 yr old has gotten aggressive with me (newphew) ever since my sister has been in fights with her bf alote lately and he takes his anger out on me and his brother but his brother happen once yesterday with me and his uncle has been for a few days now basically this whole week and calls me the maid just bcuz I do everything that involveds the kids bcuz my sister works all day everyday and I noticed it rubs off on my son but he knows for a fact that doesn't go with me how what or what can I do to help him r help the situation let's keep in mind please as I said before him and my son has autism and my son has bipolar also

Advice""":::"""