I don't want to argue with my parents

My mom Is angry yelling in the kitchen at the phone and i don't know why i have something to do with It. Context: my parents split when i was 5, i have 2 younger Brothers and i and One Brother live with my mom and the other with dad, today my dad was supposed to come to see us, or at least what my mother understood, he told her that probably he won't make It and maybe he Will arrive around 8pm, my mother understood that he Will come at 8pm, when my dad comes he brings my Lil Brother with him and my mom Is really attached to him. Yesterday i slept at my bsf house and my mom texted my dad to ask him when he Will be here to tell me when to get home, and my dad understood that when we all (mom lil Brother and me) Will get home when he gets here. (My dad bailed on us some times)In my opinion they are both in the wrong but now they are both angry with me, my dad cause i took my mom side and my mom Is even more mad cause apparently i Always choose my dad that i wanna be with my father only that she's Always the bad person and how me and my Lil Brother Who live with her should Just go live with my dad and Just victimizing herself and ranting to her friend on the phone that my dad Is horrible and that i Always take my dad side no mather what wich Is not true, if someone Is wrong i'll tell them, whoever Who they are, but a lot of time i have to tell my mom that she Is right Just so she won't take It out on me too. I can't stand her. And no i can't confront her cause she will take It personally and as an Attack and ground me cause i don't agree with her.