Hey, I recently read a fic on AO3 but now I can't find it! I think it was a one-shot. What I remember is that Tony was continually getting upset because he thinks Steve looks at him like he is his father. But then Tony time travels and meets Howard, but is introduced to people as his brother (Gregory, I think). Anyways, he meets Steve, falls in love, comes back to present time, and realizes that Steve stared at him because he looked like Gregory, not Howard. I hope someone knows what I am talking about. Thanks.