I'm going home. Mom told me a long time ago that if I were too lonely without her, I could come back to Earth as her ghost dog.
I am not lonely, but Mom is. She is sad.
So I am going home to be her ghost dog until she smiles again.
I will run next to her and she will see the grass ripple as I run by. She will feel the fleeting touch of my nose in her hand. She will hear the echo of my greeting. I will leap and bark and she will feel the whisper of my paws on her shoulders.
She will smile.
Then I can be happy.