(This headcanon isn't mine, I'm getting it off of Tumblrs avenger headcanon tag.)
Characters: Natasha Romanoff, Steve Rogers, baby OC, mentions of Clint Barton and Nick Fury
Pairing: Mentions of Natasha/Clint
Headcanon: Clint and Natasha have a child and they have to bring the child to S.H.I.E.L.D, when Natasha has to do something for Fury she hands her child to Steve.
Natasha Romanoff constantly astounded her peers. She was a spy that struck fear into the hearts of villains and yet she was also a wife and a mother to a newly birthed baby girl. Her daughters father, and her husband, Clint Barton was an equally fearsome agent of S.H.I.E.L.D, the top secret government organization both he and his wife worked for.
Though both realized that due to their jobs and their many, many enemies they wouldn't be able to leave their child in the care of any regular babysitter or nanny. So the couple agreed to take her to work with them and switch off on missions, always having one parent with her, but thinking rationally they also agreed to have one of the non-field agents watch her while they went on short local missions.
But at the moment Clint was in the Amazon foiling the plain of some super villain and Natasha was being called into Nick Fury's office as her daughter slept soundly in one of those baby-jumpers, the ones that held the baby in front of you so your hands were free.
"Good day Blackwidow, agent baby Romanoff-Barton," Fury greeted, the tips of his lips turned upwards at the small child who smiled at him with a toothless smile.
"Good day director Fury," Natasha greeted. Her hands found their way into what little hair her daughter had.
"Agent, I know agent Barton is on a mission currently but there's something I need you to do." Fury looked at the woman seriously and Natasha's hands went to her side as the youngling blabbered and drooled.
"Whatever you need sir." When in all honesty she didn't want to leave her child to go kill some sociopath who dreamt of world domination.
Natasha walked the metal halls with her daughter on her chest, bouncing herself up and down, giggling and drooling.
Natasha's eyes scanned the halls, looking for someone to watch her daughter. She kept passing fellow S.H.I.E.L.D agents and rolling her eyes at them. All the other agents she'd past so far would either teacher her daughter something stupid or they wouldn't be able to protect her if something happened.
Natasha turned the corner as her ankle biter stuck her fist in her mouth and looked up at her mother who smiled down at her. As she rounded the metal corner Atasha saw Steven Rodgers. One of her closest friends, fellow Avenger and aka Captain America.
"Captain," she called out. The blonde male turned his shoulders and waist to look at the person who called him. His blue eyes smiled when he saw it was Natasha and her infant, someone he hadn't been able to meet yet.
"Nat, and baby!" He cheered. As she approached him Natasha took her daughter from the baby jumper and handed her off to Steve with a kiss to the forehead and a murmur of 'Be good.'
"Fury needs my help with something," she told the blue, red and white spangled man. She waved her hand over her shoulder and instead of answering he looked at the baby he was holding awkwardly and brought her into his chest, cuddling her.
"Hey baby, I'm uncle Stevie." The red haired baby just giggled and touched his high cheekbones with slobbery hands.