Sister cry's too much

I had to go to the store with my mom and she made me go in by myself to get a couple of things at the store and she said I can get something for myself too and then we got back and my sister found out I got something and she didn't when she had ice cream and I didn't and she started crying and crying and then she goes up to my step dad and asked him to get her something and he said no and she started crying again and again and I asked if she wants some of my candy but she doesn't like that kind of candy so she starts crying again. So she goes back to her room and didn't come out for the rest of the day and she wouldn't talk to my mom either because she is a brat.

                                                                   picture from here