Chapter Text
Steve wasn't sure if he could survive this. His Howard was gone. And now he had to learn about his child from another Alpha? This Tony Stark, obviously a child that came after he had crashed, had been of another relationship Howard had had. Steve wasn't sure he could reign in his emotions enough to not offend Tony. The omega hadn't knowingly done anything wrong. But Steve still felt the hurt and betrayal every time he saw the omega.
Tony looked just like him. His beautiful brown eyes and his curled dark hair. Steve just couldn't handle the stress. It caused immediate friction between Tony and Steve.
"Everything real about you came out of a bottle! I'm tired of hearing about how I'm selfish and how I would have made my father so disappointed in me! You never knew my father! I grew up with him and I know I made him proud, so you can just shut up, spangles!" Tony would yell before stalking away.
"You're just a spoiled little brat, Tony. A coward behind a suit of armor. Take it away and what do you have?" Steve would taunt.
Bruce was always the one to calm them down, preferring not to Hulk out and kill Steve for upsetting his mate. It didn't help that they were both more stubborn than Howard had ever been.
Soon it became apparent that the arguments would not boil over. The tensions continued to rise exponentially up until the tesseract was stolen by Loki. Steve and Tony warred still, but a pressing matter stole their attentions.
The battle with Loki was won by avengers, with the added push of agent Maria Hill's death. Tony and Steve managed to work together for the good of the team, successfully guiding the Nuke into the open portal above Tony's tower. New York was a mess. The tower needed serious repair and the city was in absolute ruin. Tony stayed in the crumbling city to help with rebuild. Bruce allowed the Hulk to help with the heavy lifting.
Steve and Tony came to a tentative truce. Steve still felt the heartache. But he knew that Howard wouldn't want him to feel that way. Howard had moved on, and so should he.
Weeks later found Tony and Steve breaking their truce. It was a colorful argument. Bruce wasn't home. Clint was cuddling with Phil on the couch when it began.
"You think you're so neat, don't you? Coming at me with all this techo-whatsits and you expect me to just take it!" Steve exploded.
"What the fuck, man! Everyone else has a starkphone so I figured you could use one too! Excuse me for being courteous, it's how my father raised me." Tony retorted.
"Your father. Your father wouldn't want you acting like this!" Steve gestured in Tony's direction.
"Acting like what, Mr.1975?" Tony asked haughtily. "If you're referring to my omega status you're making a mistake, cap."
"Of course I am! Your father was a model omega. He wouldn't tolerate the kind of insubordination you're demonstrating now!" Steve snarled.
"What the hell would you know about my father!? I grew up with him! I would know the most about him!" Tony yelled.
"I was his mate!" Steve bellowed. He realized his mistake almost as soon as he had made it. Tony's eyes narrowed.
"Holy shit..." Tony mumbled. "You're the mystery guy."
"What?" Steve asked.
"My dad said that I had another Father, but he died before I was born. He never told me much about him save that he was in the army and he was a national hero. He also had a lot of captain America memorabilia. So I'm going to use my genius brain and guess that you're my paternal father." Tony explained.
"He was pregnant?" Steve's mouth was wide open, gaping in shock. "Oh god. He was pregnant!"
"Yes. Then he married Maria who was a real bitch. She beat him a lot. He cried out for a Steve sometimes. I guess that was you." Tony frowned. "You're my father."
"Oh my god." Steve murmured.
Tony was suddenly wrapped around Steve, clutching his midriff like a child would. Steve was suddenly overcome with emotion. They embraced, father and son, while Steve cried silently and Tony released great sobs into Steve's broad chest.
Steve and Tony were on much better terms following that heart to heart. Bruce was astounded to see them cuddling on the couch, recalling tales of Howard. Bruce bristled at seeing his mate snuggled up to another Alpha, but he relaxed when he heard the full story.
Months later, when Tony discovered that he was pregnant, Steve went into overprotective father mode and nearly killed himself by attacking Bruce. The Hulk was only calmed my Tony, who stepped in at the last minute.
All was well in Steve's heart once again. He still had a little piece of Howard, and that seemed like enough to him.