Summer

So its me and my cousin and i really love this cousin she has 5 other sisters and she was invited over to my house for the summer to get a break from them. One day out of the summer my little cousins on my dads side came over and they were so annoying i remember my mom and their mom went to the store to get something and they started crying and trashing the house i was so mad when my mom blamed mew since im the oldest. They stayed over for a long time. My mom and aunt left to get us some ice cream and they started crying again the girl cousin mainly and me and my cousin i invited over were playing roblox on our phones when she came up to us and started cry because she wanted our roblox names or whatever but we didn't want to give it to her because she was so annoying so then my baby sister woke up when my mom came back she came to the front room she PEED ON THE COUCH Y'ALL and nothing was done so i changed her and i cleaned the couch off and i moved from one couch to the other because i no longer wanted to be by them.  When i woke up my mom was in my face talking to me and my cousin talking about how rude i was to my younger cousins. When i tell you i went off i said how she said she wanted us unalive and and how she hated us and tried to hit me. So am i the bad cousin for not just tending to her and sucking it up?