Orion was your son, the only son you had in your family tree. And now, he was being student of Prima Prime! Oh how proud you are at him but yes.. he need to leave you alone due to his status being Prima student.
You gaved his forehead a last kiss and hug him before he left you alone all by yourself now, that was sad and its really heavy for him to leave you all alone without his presence on your side.
But, as the month passed he grow to be a teenage and now being Prima Prime top student, when he was walk out from the building where he used to be Prima Prime students. When he was walking through Iacon city he could saw a sparklings was enjoying the moment being with their family.
In that moment, Orion Pax stop feeling missed with you and the nostalgia spending time with you, he look up at the moon and those moonlights are reminding him of you. His only dearest carrier/mother.
Without waste of time, Orion start to run towards the first place where he get birth and the places that he called warm house, it was you. He run with fast speed not caring if he bump at the other Cybertronian.
All he want is to see you again, he felt a bit worried for not seeing you again, when he reach the places he planned he could saw you from afar. Singing the lullably that Orion knew, you always sang it on him before went to sleep.