Sadly that's something, that also happened irl. Some people are born autistic or other neurological underdevelopments (and I don't mean the hypoerfunctiining ones). This nephilim Was literally just like them, since a lot of them can't talk properly, but they do understand some things and back in the mideval ages they did similar stuff to people like that. Hundreds of kids got disposed of, bc they were underdeveloped and of no use for their parents :/
At this time of the story people where superstitious asf I can't imagine the number of people who suffered from that...
That chapter was fucked up! I think Onesta had post partum depression or something but still, what she did was horrible! Her kid was still normal regardless of his extra eyes on one side.