I'm just so over this visit with my mom and sister I see favoritism between my daughter and my…

I'm just so over this visit with my mom and sister I see favoritism between my daughter and my sister's daughter with my mom like I feel like she loves my niece more then my baby let me explain (the other day my niece was wanting to. be held and my mom had my baby holding her and kissing on her and just cuz my niece wanted my mom she put my daughter down and picked up my niece and then said her shoulders were hurting (she has arthritis in her shoulders explainable right? )wrong if her shoulders were hurting that bad she wouldn't of just put my baby down the way she did to pick up my niece ) and then I got told I over react to much to anything let me explain that part (so I'm getting my bags ready so we can leave tomorrow and I look over at my baby while my mom was holding her and she was on her phone too and my baby had just got done drinking a bottle (I think she got to hot) because of the fact that she projectile vomits and as my baby is trying to sit up so she doesn't choke my mom's pushing her back down STILL not paying attention so I yell at her to sit her up and took her away from my mom to tent to her and clean her up and as I yelled at her my mom's excuse was "I didn't know" then walked out playing the victim and telling her sob story to my aunt WHO came and told me I don't meet to treat my mom like I do and that there was no need for me to scream at her and I'm just like what ever ) I'm so over this bull shit it's been one thing after the other didn't even have a good birthday or anything or visit with my baby's other grandma cuz my family couldn't keep their shit together I'm just now contemplating on rather I should keep letting my mother see her other grandchild or not what do y'all think