Optimus Prime and Megatron

Prime and Megatron agreed to a truce, this truce evolved into friendship, and that friendship turned into a relationship. This relationship between the leaders has lasted for a couple of years now, and recently, a spark began to form inside Prime (similar to human pregnancy, but with no belly or any visible signs). Such a spark is born only if a transformer feels a strong affection for another. And now, Optimus has told Megatron about the spark:
(choose who you want to be)