I Think My Nephews Are In Danger But I Have No Idea How To Approach The Situation.

Location: Mississippi

Throwaway, looking for serious advice on what my next move should be. PSA: Domestic violence warning. I (25M) am seeing signs of obvious domestic violence from my (22F) sister and her on and off again relationship, baby daddy(23M). I'll start this off by saying me and my sister have never had and most likely never will have any sort of relationship except over the fact we are blood related. She's always been a headcase and very unwell in terms of mental stability. I wont go into too much detail but she's has to deal with being bipolar and I took that into consideration when deciding to post this. My sister has two kids (3M and less than a yearM)(half Siblings). Current BD is the problem and I will be referring to the problem as BD. other dad is a trying dad, and I respect that. A few months ago, I had just came home for a visit and my sister got jumped by BD and his cousins, complete physical brawl outside a gas station near my mothers house. When she found out what was happening, she rushed over leaving me to watch the kids. I didn't mind watching the kids no matter how badly I wanted to go over there too. Mom calls and the BD has hit her. fully on camera, evidence is clear and my sister was arrested. BD was not. enabling behavior starts when mom immediately invites BD over to pick up his kid. I will also mention the reason BD was still around and standing after what I heard was only because exposing children to the level of violence and rage I was feeling that day is not what I want little dude to remember or think is ok since he doesn't know what's going on. Anyway, after BD left and a lecture later, I had figured my mom would have learned her lesson of letting that guy into the house. Sister was bailed from jail and they talked, all was good.... for about a week. Not long after that whole situation, my sister attacks my Mother while I'm on the way and as soon as I get there I start recording and am forced to remove my sister from the house. literally trying to hit me while my nephew(3M). so after removing him from her and calling the cops. Sister gets arrested again and is court ordered to seek help or be emitted to a mental institute.

Doesn't matter how much I express my concerns about it to other family members and my mother, the same things keep happening. my sister keeps going back to BD and continues to "leave" to live in his car for a few days and bouncing around from house to house. BD and sister has been kicked out of his mothers house, a couple of their friends houses, and BD has been kicked out of my mothers house multiple times but is allowed back in cause my sister has been using her kids as leverage. Over the course of the months its this repeating pattern of subtle abuse from a domestic stand point and from the children's stand point. leaving the baby with dirty diapers on and yelling and hitting in, what I would say is, unnecessary situations like accidently spilling a juice box when wanting a toy. Normal kid stuff turned into physical discipline. I'm not a parent, I agree in a spanking or a smack on the wrist when something is considered bad but I personally feel its going a bit overboard most times. I try and document what I can just in case but not everything can be recorded in time to catch in the act. Now the main reason I'm writing this. The following is caught on cameras I installed for my mother and happened this previous weekend. BD and sister were over at my mothers house while BDs first child are outside and got into another argument turned into a physical brawl in his car. Sister gets out and runs towards the front door but is caught and slammed into the front door by BD. Mom comes out to break them apart and both are throwing hands around her trying to get to each other. its at this point my nephew comes outside and is running around while sister and BD continue arguing. Mom goes inside to get her phone and sister and BD walk off camera but yelling can be heard. Sister starts running away again and is caught again and slammed into the ground repeatedly and being hit by BD. Mom runs back out and breaks it up again. my nephew and BDs kid is watching and start crying and freaking out. videos end and sister then had a small concussion and a busted tail light on her car. A week has past and sister is saying it "wasn't his fault" and wants to go back to him. today he came over and sister snuck him into the house and when mom found out and confronted her, she threated to leave and live in her car while snatching my sleeping nephew off the couch and said if she doesn't let BD come back she'll never see the kids again.

I'm tired of hearing about this, I'm tired of seeing the abuse and not being around to put a stop to it. I can't stand by sister, honestly, she makes horrible life decisions, is technically married(separated) and has two kids none of which are the hubbys. Whatever personal beef I have against her is making my judgment biased on what I should do regarding my nephews. I don't want my nephews anywhere near this level of violence and I don't want anything to do with the BD or my sister in all honesty. I want the kids safe but out of foster care if at all possible and FAR AWAY from BD. The best I can do right now is hope nothing happens to them in the meantime. Any advice on how I can safely go about helping these kids would be greatly appreciated.