Purposely defying me

My Grandmother refuses to listen to my wishes. I'm my brothers main care giver and we are in the process of moving due to the little space we have in our current residence and me being pregnant. My grandma gave me a box of football and basketball cards and a movie. I told her to keep them at her house until we are all moved because we would most likely lose them on the move and we have no DVD player. I have my childhood room at her house filled with my old stuff I had put the cards and movie in there. Well I went to the hospital and had to drop my brothers off with her. She gave them the items i asked her not to and the youngest pitched a fit for the movie. We don't even have a DVD player yet we don't use DVDs we have Netflix and Hulu we were going to get one after we move. So now I have to listen to him every 5 minutes ask to watch the movie and cry when I say no. Then she had 2 drunks around them that I told her no many time. I don't feel comfortable around them. Its not just because they drink I used to be an acholic myself but it's how they act when they drink. They're a couple and i can't count how many times this man beat his wife and she bails him out of jail everytime. How do I know he want snap on my brothers and beat them? He also gets wayyy to close and friendly with my youngest. I don't feel comfortable about it. Then with my child I'm pregnant with she keeps getting items off the side of the road that I've asked her to stop doing. I don't know why they put in on the side of the road it may have been an important safety issue or it could be infested with bugs. I don't want to take my chances with my baby. I can afford her items so I don't need these. She keeps getting them and won't stop. Then my babies name. Annika (Monica without the M) she claims it's to hard for her to say. She asked to call the baby Ana. I said fine I don't mind if she gives her the nick name Ana. Then she starts referring to the baby as Annie. I dont like that name. I've told her multiple times Annika or Ana not Annie. Now she's claiming Ana is to hard for her to say but she's the one that suggested the nick name. I feel bad because I want her in our lives but im really about to stop letting her do anything with the kids. she's driving me crazy and they definitely won't be at her house alone if she can't keep those drunks away from them.