Natasha Romanoff was once a mother during her time in the red room. When she escape she couldn't keep her child for reason handing Peter to the Parkers when he was barely 1 years old 14 years later she hasn't touch upon her child she knows nothing of him until one day Stark show up with a new intern and how Peter see him and Pepper as parental figure she starts to get jealous and read the story to find what happens. Description is a bit off but let go with it Civil war happen but they settled their differences and are somewhat friend they're getting their and homecoming already happened only Tony know Spider-Man identity with Ned and Mj but the Avengers doesn't know that Tony know Spider-Man secret identity and Peter has already fought a couple of supervillain instead of one