I'vd been thinking about DomWolf's dhampir idea and while I agree that the mother should be uncertain, I'd expect Reanna to be the most motherly of the trio as she has been affeted by the baby feaver the most
Zsofia would be the most "motherly" because shes the one who was most excited by the prospect of being a mother. She would be the fun mum who let's her get away with things/spoils her.
Reanna would be the most defensive/protective. Quick to fly into a rage if she thinks her daughter is in trouble. The one that might actually try to kill MC if he knocks her up...
Adaobi would be the one who teaches her magic & educates her. She would also be fascinated by her daughters development. Studying her progress & would probably be more intrigued by her pregnancy than mad. But she would still be protective, probably having zombie bodyguards watch over her during the day.
But I reckon all 3 would love her in their own way.