How did Aason cause polyhydramnios?

Yesterday I recounted the first time Rome contacted her unborn child in the middle of Part 2 of Rome's Revolution. A lot of this is gobbledy-gook. I'll explain why after I show you a little more that scene:

     “I can stop pushing?” Aason asked, confused.
     “Yes. I am here now. You can just be.”
     “But Mother, when I could not find you, I did not know what to do.”
     “I understand but you do not need to do anything anymore. You just grow and stay healthy,” Rome said reassuringly.
     “Mother, there is so much I do not understand. How do these pictures come into my head? How do I know things when I do not know what they are? I cannot see yet I have seen things. All I hear is your heart and some noises but I have such memories. I feel things but there is nothing here to feel. Just you, all around me.”
     “It is confusing, little Aason. All will make sense to you as you grow older. For now, just know that your mother is here and I will take care of you. I will not leave you again. We will always take care of you.”
     “Who is ‘we’? I only sense you right now,” said the baby.
     “I was referring to your father and me.”
     “What is my father? Is he the Overmind?”
     Even though she appeared to be unconscious, in her mind, she could feel her heart sink. ”No, not the Overmind. Your father is someone else. His name is Rei. He is a wonderful man. Try and form a picture of him from my thoughts.”

When I was originally constructing the story, I was trying to emphasize the difference in the build between the Essessoni (us) and the much slighter-of-build Vuduri. It occurred to me that the child of the two branches of humanity, if it took after the father, might be really, really large. That was my original motivation at least. But then I figured out that before the child was born, there might be one pound difference between a child of then and a child of now.

But I still wanted Rome to be in distress so that they would have an excuse to fly her into the Lion's Den aka the Vuduri compound and reconnect. That would allow me to create the split narrative structure which would then let me write two intertwined stories.

Tomorrow, the final part of that scene.