Perhaps it was the result of his over - exposure to the dangerous elements in his Iron Man suits over the years. All those battles and the radiation or toxins he has been exposed to might have finally taken a toll on his body.
In this fanfiction, Pepper might struggle a bit with the idea of being pregnant while Tony is constantly in the spotlight as Iron Man. She could worry about how their child will grow up in such a public environment. However, Tony reassures her that they can create a normal family life within their extraordinary circumstances.
There could be. Fanfiction is a vast world full of various creative ideas. Writers might be attracted to the idea of Tony and Pepper being Peter's parents as it can bring new storylines, such as how they would raise Peter in the Stark household, with all the technology and wealth at their disposal. It could also explore how Peter's powers would be incorporated into their family dynamic.
In this fanfiction concept, it could bring a whole new dynamic to the Marvel universe. Peter being their son would mean he has a very different upbringing. He might inherit Tony's genius and Pepper's business acumen. There could be stories about him growing up in the Stark mansion, having access to all of Tony's technology from a young age. And perhaps he'd be trained by Tony in both technology and self - defense much earlier, leading to a Peter who is even more formidable than in the original storylines.
In these fanfictions, Pepper's character often develops into a more assertive and heroic figure. She starts off as Tony's assistant, but as she saves him, she gains confidence. For example, she might become more fearless in the face of danger. She may also develop new skills, like combat skills if she has to fight off those who are threatening Tony. Her relationship with Tony also deepens, becoming more of an equal partnership rather than just an employer - employee relationship.
One common theme is the anticipation of parenthood. Tony might be shown as both excited and nervous about becoming a father. He could be constantly thinking about how to keep Pepper and the baby safe, especially considering his dangerous lifestyle as Iron Man.
The relationship could develop gradually. Peter would show his gratitude towards Tony and Pepper for taking him in. Tony would see Peter as not just a protege but also as a son. He would share his knowledge and experiences with Peter. Pepper would be involved in Peter's daily life, making sure he has everything he needs. For instance, she might cook his favorite meals or help him with his schoolwork. As they go through various challenges together, their bond would strengthen.
In the fanfiction, Pepper could find out she's pregnant right before a major crisis that Tony has to deal with. She has to be strong on her own while he's away, and when he comes back, he realizes how much she has sacrificed. This leads to a deeper bond between them and a stronger determination to create a happy family.
In many fanfictions, their first kiss is often a culmination of a building tension. It might be in a moment of great relief, like after they've overcome a major crisis together. For example, after Tony survives a dangerous battle with his suit malfunctioning, Pepper rushes to him, and in that emotional moment, their lips meet. It's a kiss filled with unspoken emotions, relief, and a new level of closeness.