Tony raises Steve's daughter

[bookwyrm124.livejournal.com]

Hello all! I've been looking for a story and I'm beginning to think I'm mushing two together. What I remeber is: Steve and Sharon are together. Steve disappears through a portal or rift, etc. Sharon finds out she's pregnant and tells Tony she has no interest in raising the baby. Tony adopts her. Steve comes back 5, 10 years later and Tony panics that Steve will want to take the little girl.

Any ideas? Is this one story or actually two?

Thanks!