Some quick backstory, for the uninformed:
I've lived here at my parents' for a while now, along with my brother.
My sister got married a while back and moved about an hour from here, with her husband and baby (the baby is about 6 months old)
My sister and her husband split up
My mom went to live with my sister and the baby in the city
So a couple of hours ago my sister calls, screaming, saying "I want to talk to my daddy so I can ask him to tell my mommy to give my baby!" Apparently she was drunk, and spent about an hour on the phone with my dad. Apparently she stumbled and dropped the baby because of being drunk, and I guess my mom wouldn't let her hold her.
So my mom called a bit ago. My sister beat the shit out of my mom and the neighbors called the cops, so she's in overnight lockup now.