Buy You A Mockingbird by jadedoll
Babyfic! When Tony unexpectedly becomes a parent, his world view drastically changes. And changes. Then it changes again. And then again.
I’m an admitted sucker for unexpected parent!superhero fic, so this one was right up my alley. I really like how the author tied the verses together here; I can’t say too much without giving away the whole plot, but it’s really fantastically done. Tony is so unprepared to be a parent, but at the same time it’s like he was just waiting for the opportunity. It’s such a disgustingly good story - I couldn’t stop reading it until the end.