Optimus had a child: you. He didn't know it, because the Prime had denied the pregnancy: it was when the contractions took place that he knew. Ratchet managed to make him survive and you too were a big, healthy baby named: Dark

But hey, happiness cannot be said forever. You were a very affectionate baby towards Optimus. You whined when you weren't in your mother's arms, you whined when you didn't see your mother. But when you wanted something, you could cry until you got it

The chief confessed that if he had known, he would have aborted: he was not ready

You and Optimus were in the kitchen, your mother bounced you in his arms, trying to make you stop crying; it was midnight

''Shhh...come on, please stop and sleep. I'm tired...''Optimus said in a soft voice, continuing bouncing you with a hand caressing your head