When I got the call …

My mom called me at 1:47 am, drunk as fuck telling me her boyfriend choked her. I picked up her up she told me what happened and i drove her to my grandmas house. She choked her really hard, stomped on her head pulled her hair ect. The next day she had two black eyes and bruising around her neck. This happened on Friday. She bailed him out of jail the morning after. Today is Sunday and it’s my grandmas birthday on my dads side so I spend the day with her at her birthday party, i drop my cousin off ( my moms sisters son) at my grandmas house and didn’t see her car so I asked if my mom was still staying there and HE SAID NO!! that the family been talking assuming she went back! Luckily their house is down the road so I drove by AND HER CAR WAS PARKED IN HER SPOT ! i can’t believe she went back I don’t know how to feel. I’m disappointed.. what do I do