By the time she has returned, the children will have become adults who will love her red hair and will have forgotten how she used to get so angry. Before she knows it, she will be really grown up, and she will try teaching English, and then she will try being a social worker, and then she will try being too many different things in too many different states. She won't know what she doesn't like about these jobs. Soon the red will start fading, and the hair dye just won't quite be able to cut it. She will age so quickly alone.
People do that.
Now, twenty more years have passed, and now she doesn't have a temper. Now she isn't the adventurous one. Now she laughs to cover other emotion. She has exhausted her dreams and does not have new dreams anymore, she says. She doesn't drink soda in cans and has forgotten the story about a time when she wanted to and has forgotten about the boy Sarah never introduced.