Is AUTHOR wrong in the post ? POST : I will preface this by saying I am upset and on mobile so I am sorry for the grammar/formatting issues.

So let's start at the beginning, when I (24f) was younger (around 7 or 8 I believe) my mother married my stepdad and I went from an only child to having 2 older (step)brothers. One of them is 4 years older than me, the other is 8. Soon after we got all moved in and settled the eldest's, we will call him Bob's, attitude towards me changed, he went from a protective, fun, new big brother to very short tempered and downright mean. Soon the "mean-ness" got worse and eventually became physical....in every sense of the word. Long story short mom and I eventually left and things got much better.
  Fast forward to last year. My mom had since  remarried and was trying to leave her current asshole of a husband, so I moved her in with me and helped her get an apartment of her own. She was very down and depressed and reconnected with her previous husband. (note: I had no issues with my step dad at all, only his children ) They hang out sometimes and talk and all is good on that front....now we get to the messy current situation.
  So I live in the Midwest US and it's still pretty dang cold out. Well earlier today while talking to my mom she mentioned how Bob and his wife were asking about homeless shelters in our area because he had already gotten frostbite last week and wanted somewhere warm to stay.(I feel I should add they are homeless by their own stupid meth fueled choices) Well I gave her the info I knew about local places to get some help, she thanked me, and that seemed to be the end of the conversation. Then I get a phone call about a hour ago from my mom asking for some advice, she wants to let them stay with her for a night or two, or get this, SHE WANTS THEM TO STAY IN MY APARTMENT!!!!! My mom, myself, and my boyfriend all have apartments on the same floor of the same building so I spend a lot of time across the hall at my boyfriend's apartment.
  I flat out said no, no way, hell no, nein, non, NO. I told her if they show up I will call the police and have them removed from property. Now she is acting like I am some kind of heartless garbage person because I won't open my home to a person who not only physically,mentally, and sexually abused me as a child, but who has been arrested and convicted of drug charges multiple time and freely admits to using. 
  So am I really being the asshole here for not wanting them anywhere near me or my family? 