Okay fic where Shane finds out he is pregnant when he's with Rose and keeps it secret until let's say Hayden lets it slip and doesn't tell Ilya he's the father, doesn't tell anyone who the father is and some people assume he doesn't know but it's not obvious to Ilya that the kid is his so he doesn't go to Shane and ask, he just assumes he missed his shot with Shane and well, he doesn't move on exactly but he does set up a nursery in his house and pretends it's not for Shane's baby.
After the baby is born Shane and Ilya start seeing each other again and Shane is worried that
1) Ilya will be mad he didn't tell him about the baby and
2) that he'll decide he doesn't want to be their dad
Something something commitment and Parental trauma and babytrapping angst
And then Shane brings the baby to a hookup in Boston (in this au Shane moved to Ottawa first because the Metros did not like that he had to take time to have a baby and when he was pressured to get rid of it Shane was angry and quit and posted the recording of the conversation online so the Metros is got an overhaul but Shane traded to Ottawa anyway) it's late enough when he arrives that it's almost baby's bedtime, feeding routine and then sleep so Ilya doesn't have to/get to interact with baby and Shane is not reading into the nursery Ilya shows him because he heard that Cliff is recently married with a baby on the way and that's Ilya's best friend so of course he's got a room for the kid and Shane doesn't keep the door open for the routine so he doesn't see Ilya hovering at the closed door separted from everthing he's always wanted.
Anyway Shane and Ilya have their fun but Shane is a single parent and while his parents and the team sometimes help he's still the main caregiver and exhausted, so he pretty much passes out after they're done and Ilya doesn't want him to leave so doesn't wake him.
So, when baby cries down the hall Ilya shushes Shane and gets up, he changes a diaper and rocks baby, murmuring is soft Russian that quiets them immediatly, almost as if they recognise the sounds.
And Ilya spills a secret he never means anyone to know.
'I wish I was your Papa, then your Daddy wouldn't be so tired, I'd do anything you needed, never leave you or your Daddy behind. I'd love you so much more than I already do, little one, just like I love your Daddy.' By this time baby is asleep and Ilya settles them back in the bassenet and turns to go back to Shane only Shane is crying in the doorway because Shane learned Russian so he could teach the baby their father's language so he understood everything Ilya said.
And well, Shane tells him the truth and why he was worried about telling him and then being scared of Ilya being mad and the reason that Shane even gets to bring the baby along on trips is because they've had threats from fans and Crowell and it's better to have Baby close because the Centaurs are very protective of them so.
Ilya is a little upset but also worried because Shane has been dealing with so much on his own while still caring for their child and after Shane falls asleep again Ilya starts making plans to move to Ottawa and be there with Shane as often as he can, the Boston team will understand, they already know he's been in love with Shane since Ilya had got drunk after the baby was announced as having been born, crying and drunk on Cliff's couch saying he should have been with Shane as support and calling the baby his and theirs so when Ilya makes his announcement later they all just assume he's the dad that stepped up, and just nod when Ilya says stuff like 'No, is my baby, for real' and say 'Yeah, we know they are your baby' and 'yep, you make that same face' when the baby is pooping, and are loving teasing but none of them even think Ilya means genetically because aside from the curls baby looks just like Shane, which Ilya loves of course but his genes didn't even try did they.
And baby gets so many Hockey uncles that love this kid and people become genually afraid to even hint at a threat because some Hockey Player will comment on your thread asking for your address and questoning if you hate kids and if you can fight so they shut up and Crowell gets arrested eventually so baby is safe but they still get to go with the team because they are the assistant coach, basically they just cheer the team and hold Wiebe's clipboard.