First time posting on this subreddit, hello all!

I’ve (f22) been volunteering with this local business since July, and I enjoy volunteering there every time that I am able to. It’s free meals for seniors, every other day or so. Now go get into the nitty gritty of it all…

I don’t want to call this girl my step sister, I don’t even see her as my family due to how nasty she is. She has this mentality of that my mom is attempting to steal her own dad away from her, she thinks this in every prior relationship my step dad has had, even with her biological mom.

And with that mentality and her addictions (alcohol and drugs), comes violence that I’m surprised a 21 year old can do. Threatening my mom’s life, breaking into our house to start fights, keyed my mom’s vehicle and attacking me when I tried to leave the house due to the constant yelling and physical violence (the old “attack someone else to get under my mom’s skin even more”). And that’s just a select things that she’s had done, she has no problem with emotional and mental abuse towards other people.

I saw that her name came up on the “new volunteer list”, I even asked my step dad about it and he confirmed that she was going to volunteer. I don’t think she’s aware that I’m there as well but in so many places to volunteer, she chooses that?

I had a sinking feeling that her seeing me doing the volunteer job, it’ll invoke some violence. And I don’t want that to happen so I made up the courage to tell the person who is in charge of the volunteer list on how horrible of a person she is to me and towards my family, not 100% in detail but enough to explain how serious it got.

And my mom’s pretty pissed off at me, stating that I snitched on her, she’s trying to get into the girl’s good side to prevent more lashings out. I even asked if she was the one who suggested that she should volunteer where I am. She denied it but who knows? She’s the type of mom who will go through hell with someone and still attempt to see the goodness in them, even if they resort to violence in such a short amount of time.