The virgin birth portion is rather odd. NPCs are designed to have offspring in the wild, especially if they are fucked by the player or their allies and released from the mansion or let go post combat. However the remaining a virgin portion is interesting as I’m not aware of a way for npc pregnancy to trigger without having sex first.
I’ll look into the code, but you may want to start working on some solid doctrine for that virgin birthed daughter wandering the wild. Either it’s a bug or a miracle, better safe than sorry!