Quick author note::: I was inspired to do this one listening to my own siblings ramble about super family, so I'm starting this adoption AU. Aunt May Parker is out of the picture, replaced with "Aunt Mae" Madeline Mae Stark- Her name a play on the classic Aunt May. Probably slow burn Maddie/Bruce eventually- Bruce and the family aren't really even friends just yet. This is probably a slow start but I have quite a bit hashed out. I hope you like it! More answers will come as the plot fills out. This is just an intro to the idea to see if anyone is interested.

You know Marvel owns these babies, not me.

Thanks for reading!


Steve Rogers-Stark tossed the keys to his motorcycle in the catch all bowl at the door to his home. He froze, listening when he thought he heard laughter from the upstairs sitting room. It was mid-afternoon, Tony would be at work for hours yet, and it wasn't nearly time for him to pick Peter up from school. Slowly, he made his way over to the stairs, taking his small handgun from the the holster pocket on his leather riding jacket.

He froze at the top landing and listened again. The sound was definitely his son laughing. But why, and better yet, how, was he home at this time of day? He returned the safety on the handgun and called out. "Pete?"

"We're in here!" A humored female voice replied, answering all his questions.

"Madeline?" He ask as if it weren't obvious who was speaking. "I didn't see your car..."

"Yeah, sorry. I called Tony he said it was cool if I got Pete early since I haven't seen you boys in like a month. "I parked in the lower deck. I should have texted you! I thought he would." He found his sister-in-law cross legged on the floor beside of Peter, two classes of milk and a plate of cookies on the table in front of the television.

"Oh its always fine. You know that." He came on into the room, letting his guard down. "How was school, bud?" Steve ask, ruffling his son's light brown hair as he came into the room. He bent down and gave Madeline a kiss on the cheek.

"Boring. But Aunt Mae came and got me and was telling me about Dad's arrest record?" The twelve year old grinned.

"She's doing what now?" Steve questioned, smiling at his son, but giving a sparing glance to the young woman in the floor, who laughed.

"They were talking about the difference in vigilante justice and sanctioned action in social studies, Steve. Don't lay an egg." Madeline stuck her tongue out at the blond and continued. "And he asked me if what you guys did was vigilantism."

"We're employed my SHIELD, bud." Steve said, and Madeline seemed to pick up on his confusion.

"Oh my- Ah! Do you not know either?" She said, sitting forward, obviously excited. "JARVIS?"

"Yes, Miss Stark?" The AI answered from the speaker in the ceiling.

"Roll the news tape from Tony's arrest." She said, grabbing her glass of milk and coming to join her brother in law on the couch. "This, dear Cap," She said, leaning into his shoulder, "Is the vigilantism of which I speak."

Steve watched as the CNN news cast set stone faced and began to read the headline; 'STARK INDUSTRIES HEIR ARRESTED IN ASSAULT CASE' and a very, very entertained, almost giddy mugshot of a smiling Tony flashed behind the anchor who was giving details.

"I don't get it..." Steve said.

"Shh- Its about to get to the part where he's leaving the jail on bail! They talk to him!" She said, swatting over at him. Steve watched as the screen cut to a group of lawyers walking around a younger, arch-reactor free Tony.

'Mr. Stark, Mr. Stark! Care to give a statement?' the called. The lawyers obviously didn't want him to speak, and were trying to usher him along, but Tony stopped and turned to the cameras in his face.

'Yeah, I would. To the son-*blurred mouth and beeping* who laid his *another censored comment* hands on my sister,' Tony leaned into the camera 'Son, you better hope I don't see you again.' He blew a kiss into the camera nd the video cut back to the news room.

'We now have the details released that the charges placed on the young billionaire Tony Stark were due to a domestic assault on his younger sister, Madeline Stark. Sources say that the accused was a twenty-two year old classmate of the young woman, who she had been dating for a while and allegedly had physically abused Mr. Stark's sister on multiple occasions.'

"Cut video, JARVIS." Madeline said, and the television returned to its rest screen with the Stark Industries logo.

"That was not what I expected." Steve said, sitting back.

"Of course, the Judge only gave Tony like a thousand dollar fine for the public disturbance, but it was absolutely awesome." She laughed. "Tony really handed his ass to him."

"What had happened, Aunt Mae?" Peter ask.

"Maddie Mae, please watch the language, we're trying to raise a gentleman." Steve reminded her, but she rolled her large brown eyes and looked back to her nephew.

"Well, you know your dad was basically raising me too, right? So after your grandparents died, he was super protective. I mean- I was just seven when that happened... Anyway, I was in my second year at MIT and got tangled up with this guy... His name is unimportant. We dated a bit and he decided to try and control and hit me. Well, I was young, seventeen actually, and stupid, so I let it happen. Then Tony came by to bring me some things for my dorm and he found my face all busted up. He immediately went and found the guy at his job on campus at one of the snack bars and he beat him to a pulp."

"Cool." Peter said.

"Probably a good thing that was before Iron Man or there wouldn't have been anything left to threaten..." Steve said under his breath.

"Maddie and I have laughed about that several times, I promise." Tony's voice sounded from the doorway. The three turned to see him propped up on the door frame, humored look on his face. "I don't, however, remember giving you permission to tell my boys my deep, dark past."

"Shut up, Tone." Madeline laughed. Tony made his way over to the couch and he wiggled himself into the nonexistent space left between his husband and sister.

"I get why Pete didn't know, but why didn't you tell me?" Steve ask, pretending to be offended as Tony kissed his cheek and shook his sister's bun, messing up her hair.

"Because it involved telling that all those things happened to Madeline Mae, and those are her things." Tony answered. He turned himself slightly and laid back onto Steve and kicked his feet over Madeline and onto the arm rest. "So- Maddie, tell me about Japan!"

"Spoilers! If I tell you now, what will I pretend to inform our board about tomorrow?" She laughed. Tony rolled his eyes and gestured for her to continue. "Right. Well, they are on board- all investors are very, very interested in the cradle. We have some neurosurgeons we're looking at and they agree that the tissue printing tech is probably years off, but we have the backing to start trying."

"Yes! I knew they'd love you!." Tony said. "Hey, Petey, hand dad a cookie." He said, catching the tossed sweet.

"So- I guess that means we get to eat good to celebrate, right?" Peter said, sitting up further.

"Do you not feed this boy when I'm not here?" Madeline laughed. "That is always the first thing he wants to do!"

"Pops makes us eat healthy food." He wrinkled his nose.

"Pops is the worst like that." Steve said mocking back the same face. Tony tiled his head back and looked up at Steve, who needed no further prompting for him and Peter to leave the room. "Come on, Pete. Lets get you out of your school uniform and you can think about where you want to go, since you always pick anyway..." He pried himself off the small couch and guided his son from the room.

"So-" Tony said sitting up, face to face with his younger sibling. He looked worried, which annoyed her just a bit. "What time is your scan?"

"It's at two fifteen on Tuesday. And really, I'm twenty six years old, Tony. You don't have to go to the oncologist with me anymore. I've been free for years." She reminded him.

"I will stop going with you when I'm dead- Like it or not. I want to hear it for myself." Tony bit back.

"Seriously, brother, you have enough going on. You have a son hitting puberty, project your worry on him. Whatever was in that serum you had pumped in me at hospice back in the day is holding up great. I'm fine." She reached over and squeezed his hand.

"No. No I really need to hear it for myself." Tony said, shaking his head. Madeline laughed.

"I do not know how Steve lives with you." She said, standing up. "Look," She held her hand up and the tips of her fingers glowed a radioactive-bright shade of green. She picked up a cookie and it burned in her hand. She tossed the charred crumbs in a nearby flower pot. "See? Whatever it is is holding up fine." Tony swallowed tightly.

"The scientist I had help me formulate that... Maddie-" He shook his head. "Did you see the news about the thing they're calling 'Hulk'? That is him. He cured stage four cancer in you with that serum. He was looking at the serum dad had used on Steve and the one we cock-tailed for you- He has been trying all this time to duplicate the results without the weird, super-powered side effects you and Steve both have. His lab exploded and the radiation turned him into the big green beast."

"Okay?" She questioned. "I mean yeah, that sucks. But what does that have to do with me?" Tony sighed.

"I just want to hear the doctors say the PET scan is clear and the blood work is all normal. Okay?" He pleaded.

"Fiiiiiine." She whined. "Whatever, dad." she added. She meant it sarcastically, but as Madeline walked off to the guest room she always occupied when she stayed with her family, she couldn't help but think about where she would be without her brother. She shook her head, thankful he had been there for her when their parents had their crash.


Let me know if you like it and want to see more!

Thanks for taking the time to read!