Literally created an account JUST to find this because it's driving me up the wall...
Probably an older fic, probably longer, but not really sure. 99% sure it's mpreg, maybe a/b/o? Not sure of the main plot. All I remember is at some point Tony's not allowed to see his baby b/c reasons (Tony thinks it's b/c team knows he'd be a bad mother/parent or hurt baby or something), and I think someone else (Steve? Bucky?? Father of baby??) name the kid Howard (or something similar) without consulting Tony, and Tony wanted to name baby something else (pretty sure he sneaks in/is let visit sometimes and calls baby by other name). At some point team figures out something is wrong, and eventually it's all resolved and baby gets name Tony picked.
(sorry donno if tags are right, new to this!)