Amy\'s Character

Today, I took my two daughter to a local story. Amy found a interesting toy which has magnets and steal balls for building up three-D structures. Amy had one before but she just messed up everything and could not find them. I am hesitating. I asked Amy to ask her sister for it. I wanted to give her sister more authority over Amy. Amy went to her sister for buy the toy. Her sister told amy to tell dady something. I do not know what she asked Amy to tell me. However, Amy did not want to tell me. Her sister insisted Amy to tell me if she want to buy that toy. I saw Amy's said eyes; however, I could not invovle because I already give her sister the authority. I should keep my promise. Although Amy wanted that toy so badly, she did not betray her feelings. How a character Amy has!