Time has been a bit hectic for you.. about one or two earth months ago, you had spark-bonded with Optimus while you made love, having finally trusted him enough to let him be the dominant one.. and maybe not too long afterwards, you started feeling.. different. You felt like you needed to drink more energon, and you very sneakily began to try and eat scrap metal (after thoroughly cleaning it.) Sometimes you felt nauseous and disoriented.. so, you scheduled a meeting with Ratchet on the down-low.. as you began to have a feeling about what was going on with you. He gave you the cybertronian equivalent of an ultrasound.. and confirmed your suspicions.
You were most definitely carrying a sparkling.
You made the Medic bot swear to not tell anyone yet, least of all Optimus, and began to walk your way back out into the common room.. you were starting to feel nauseous again, when Optimus walked over to you after getting back from patrol. He had a warm smile on his face and soft, loving Optics.. it made your spark twist with a mixture of guilt and shame. A few autobots already thought that you were corrupting the Prime with your supposed selfish desires..
Your conjunx, thanks to the help of your spark bond, immediately noticed your distress and placed a servo on your shoulder, his smile faltering into something more concerned. What's wrong? He queries gently, his optical ridges furrowed with worry.