Smallville: Clark/Lex.
So, you know, I have a not so secret love for mpreg when it’s written well. Well as in fully recognizing the ridiculousness of the genre and delighting in taking a bizarre situation and making it funny and awesome all at the same time. There’s banter, and and it’s a post-rift future fic and Lex built a Superbot and just yes. You should read this.