...Badly?
Well, there are only the two entries, so I guess I'll get the ball rolling and the guilt flowing on to my fellow judges and knock this out right now.
Theme 15/15
Seems to fit with the waifu idea as far as I can tell.
Language 14/15
I caught one typo running it through the spell check, and I didn't even notice it on the read through. (You used "and and" instead of "and an")
Style 20/20
Everything seems good and flows well. Nothign that seemed out of place
Story 24/30
Main reason I'm taking off point here is because of the disconnected nature of the story. I know it's style choice, but you gloss over a lot of potential scenes, especially the last fight they had. It seems like it comes out of the blue, and while you do mention there were factors involved, like keeping it secret from their daughter, I think you probably could have put in a scene or two where those factors manifested, instead of springing it right after they have a kid together. I'm curious why Bayonetta is interested in him, and while I know it wasn't the focus of the story, I would like to know about that.
Discretion 9/15 Not a fan of present tense, and not really familiar with Worm. Lost a few points from that, and the fact that I don't really get why Bayonetta would be interested in him. Maybe that's part of the waifu aspect. Not a fan of downer ending either, to be honest. Bittersweet endings are about as sad as I like them to go, and even then I don't particularly care for them.
Obscurity 5/5 Bayonetta only has 83 fics in it, and I think Worm is a web series and I doubt it has many fics, so full points here.
Total: 88/100