Imagine that AU where Pepper realized that thanks to Extremis, she counted as 'enhanced' and so would her baby, while Tony, Rhodey etc didn't. Pepper who's forced to sign the accords or else and Tony assures her he'll work on amending them, but that promise never comes, instead a baby does. A baby Ross wants registered at birth, tested for powers. Pepper using that phone Tony won't ever touch to call in the real Avengers, to hide her baby far away from Ross, while she tries to fix things.
Thank God he kept the phone. That’s about the only thing Pepper has to be thankful for now, where Tony’s concerned.
She leaves the house, takes baby Morgan with her, to the park. Morgan’s too young to really play with other kids, which Pepper doesn’t mind. Pepper worries about the Extremis, how it might manifest itself if Morgan has her favorite toy snatched away by some unsuspecting, unenhanced child. So far, Extremis seems only to have helped her. She can see farther than she should at this stage. She could hold her head up immediately after birth. Nothing more extraordinary than that, so far, but Ross still wants her.
So no, Pepper would rather not have Morgan around other kids right now, just in case. She gets to keep Morgan close, doesn’t have to share.
Except that won’t be the case anymore. Not unless she wants to share her daughter (read: lose her) to Ross and his lackeys.
Tony’s away in D.C., meeting with them now. Being their poster boy. He’s always been good at working a crowd, selling a product. Even if that product is mass incarceration, the civil rights of thousands disappearing. He’s away, so she has time. Unless he suspects what she’s doing, in which case he’ll be home in seconds, and she’ll never get another chance. At least not without things turning bloody again, like they did at the airport.
So she leaves the house, because there are countless devices connected to FRIDAY that could be listening. She leaves her regular Stark phone, Stark watch. Even the reading glasses Tony made for her that have far more bells and whistles than they should. The only tech she has on her is that ancient burner phone. Without the glasses, she has to squint a little. Fortunately, there’s only one number in the contacts.
She sits on a park bench, listens to birds chirp. Morgan sleeps peacefully in her stroller as the phone rings, rings again.