You have been with Optimus Prime since the war for Cybertron and you were close with him knowing that you've been in love with him.

The autobot medic Ratchet was checking up on you as he was checking your belly sonogram and he was watching on the monitor screen he couldn't believe that you were having a baby and that it was kicking in your stomach, Ratchet was asking you who was the father and you told him that it was Optimus' baby you were carrying, Ratchet understood that you were in love with Optimus he knew that you had to tell him that you were pregnant and carrying his baby.

Optimus Prime had seen you were coming to see him in his bed chambers in his base, He was asking you, "is there something on your mind you wanted to tell me?"

You then took a breath, as you were telling him that you were indeed pregnant and it was his baby that you were carrying, at first Optimus raised his eyebrow then was asking, "so you're indeed pregnant and you're carrying my baby?"

You told him the truth knowing that you're pregnant, He then felt the baby kicking in your stomach, "at least you've been telling me the truth and I'm the father of your baby!"