Yeah... honestly, that seems like a more likely outcome with Patch here. The chances of changing things for the Nephilim seem pretty slim, this being Patch and Nora we're talking about here.

Honestly, I could even see him LETTING the poor kid be used as a host, or raising it to get used to it. *Shudders*

And while that comeuppance would be nice, I figure the kid still has a chance now of not being as awful a person as Nora or Patch, and killing him might fix the mind control he has on Nora. Then she grinds a level in badass and goes Sarah Conner on any angels who try to hurt her baby.