Read the following context and answer the question.
Context: She went and spent the money without even telling us it was here ! I was so angry . I had plans for the money and now the only thing I got was from my boyfriend and even though that 's really all I care about , my little sister is 7 and she deserves something . My mother did n't even get her anything , not even a cake , but she bought her cigarettes thought , you best believe .
Question: Why did my mom make the purchase that she did ?
Answer:


She is a selfish grandmother .