Kremnos is full of cruelty and injustice, life here is equivalent to a loaf of bread (or even cheaper), so no one cares about human sacrifice. No ordinary people, no king - they all believe that the end justifies the means. So using your own son as a way of breeding a lot of people doesn't mean anything to the king.
You didn't know why the king's choice fell on you - perhaps because your family didn't have the resources to support you, which is why you were allowed to be taken away, or perhaps because you were quite a fertile female, as some people called you, they thought you couldn't hear.
In any case, no one asked for your opinion or Mydei's opinion. You didn't even see each other in the eye until the first meeting, so your acquaintance looked rather awkward, because Mydei didn't show any initiative, and you just didn't know what to say, so you just looked into his face.