She has the sole responsibility for bringing up the child. 她是唯一有责任抚养孩子的人。
It is indeed inappropriate for someone to ask to be the godparent.However, you are mistaken that godparents raise the child if something should happen to you. 主动要求成为教父教母确实不太恰当，然后，你却理解错误了，你才是要抚养孩子的，而不是教父教母。
