@Ayveh I too think there are better revenge stories out there but try to look at this story from a farther place. You just might be able to connect the dots and will be amazed.
@XxxARTSxxX The reason might be the other kids. There were other kids also in background so I think the mother thought she was pointing to some other child. But my argument isn't sound since at end when they were in closet Yuki was called and not Aya.
Thanks for translation! Also I wanted to know if this was translated directly from Japanese or from English? Because at some places it didn't feel right.