Maybe they have a past connection to Italy that is slowly revealed as they speak the language. For example, Natasha might have been trained in Italy for a while, and Tony discovers this through their conversations. It would add depth to their backstories.
Perhaps they are both undercover at an Italian gala. Their Italian conversations not only help them stay in character but also create a new level of intimacy between them as they share secrets in a foreign language. It could be a great way to explore their relationship deeper.
In a fanfiction scenario, Tony Stark speaking Italian might find himself in a situation where he has to give a speech in Italian at a tech conference in Italy. He would use his charm and the language to captivate the audience. He could start with a warm 'Buongiorno a tutti' (Good morning to all). His speech might include references to Italian engineering and design, and how Stark Industries can incorporate those elements. His Italian speaking ability could also help him network better with Italian tech companies and enthusiasts, opening up new opportunities for his business.
One possible reason could be that Tony has some pre - existing biases. Maybe he has a set idea of the type of person he wants on his team and Natasha doesn't fit that mold in his mind. For example, if he's looking for someone with a more technical background and Natasha's skills seem more combat - oriented to him at first glance.
Another theme is teamwork. They are both part of the Avengers, so many fanfictions focus on how they work together on missions, whether it's fighting a new villain or rescuing hostages. Their different skills - Tony's technology and Natasha's espionage abilities - make for interesting team - up scenarios.
Natasha may come to view Tony as a kindred spirit. If she discovers that he also has a longing for real connection like she does, she'll feel a sense of kinship. His true nature might show that he is not as different from her as she initially thought. They could then develop a closer friendship or even something more, as they realize they share common emotional ground beneath their outward appearances.
One common theme is the fear of the unknown. Since they are both superheroes, they're not used to dealing with normal life events like pregnancy. Another theme is the support they give each other. For example, Tony might use his resources to ensure Natasha has the best medical care during pregnancy.
One common theme is trust. Since they are both Avengers with different backgrounds, building trust between them is often explored in fanfiction. For instance, in many stories, they start off being cautious around each other but gradually learn to trust completely.
One reason is that in the Marvel universe, they are part of the same team. So, there's a lot of potential for interaction. Their different personalities can create a lot of interesting dynamics. Natasha's care for Tony can be seen as a way to balance out his more reckless side. Also, fans love to explore the idea of characters who seem tough on the outside, like Natasha, having a soft spot for someone like Tony. It adds a layer of depth and emotion to their relationship that is fun to explore in fanfiction.
One possible plot could be that Tony and Natasha reunite in heaven. They might look back on their time on Earth, the battles they fought together. They could share their regrets, like Natasha might regret not being able to do more for the world before her sacrifice, and Tony might regret some of the decisions he made during the various conflicts. They then start to explore heaven together, meeting old friends who also passed away and reminiscing about their shared memories.
One idea could be a story where they discover their sibling bond in a rather unexpected way. Maybe they both get kidnapped by a common enemy who reveals the truth about their relation. They then have to work together to escape and along the way, they share memories from their past that they didn't know were connected. For example, they might find out that they both had a favorite hiding spot as children in two different locations that were actually part of the same secret family place.