The aftermath can also involve a lot of confrontation. Steve might try to justify his actions, which only makes things worse. In a particular fanfiction I read, Steve thought he had valid reasons for his infidelity, but Tony just couldn't accept it, leading to a huge rift between them and their friends having to take sides.
In many of these fanfictions, the aftermath is about rebuilding or redefining the relationship. Sometimes they manage to work through it and become stronger, but more often than not, it's a long and painful process. There could be forgiveness on Tony's part after a long time, or they might decide to go their separate ways and find new loves, which is a common theme in the genre.
One way could be through communication. Steve could come clean to Tony about his feelings for Bucky and apologize sincerely. Tony might be able to forgive Steve over time if he sees that Steve is truly remorseful.
The fanfic alters the perception of the characters in multiple ways. Steve's reputation as a trustworthy and noble character is at stake. His actions of 'cheating' are not in line with what fans usually expect from him. Tony, who already has a complex personality, now has another layer of being wronged added to his character. Bucky, who has his own set of issues in the official stories, is now part of this love triangle that further complicates his image. It shows how fanfics can reshape the understanding of beloved characters in unexpected ways.
Tony might cut off his relationship with Steve completely. He's a proud man and wouldn't tolerate such betrayal easily.
In the fanfiction, Steve leaving Tony for Bucky could also make Tony more guarded in future relationships. He might be less likely to trust people easily, especially those who were close to Steve. And Steve, on the other hand, might be focused on building his relationship with Bucky, leaving little room for any kind of reconciliation with Tony.
Well, it could severely strain their relationship. Tony might feel betrayed and hurt. He could start to question Steve's loyalty. Since Steve is ignoring him for Bucky, Tony might become resentful towards both Steve and Bucky. It could lead to a rift that's hard to mend in the story.
In 'light and dark novels', characters often start in a state of relative naivete or simplicity. For example, in 'The Mortal Instruments', Clary starts off as a fairly normal girl and then as she is exposed to the dark world of demons and Shadowhunters, she develops her skills and her understanding of good and evil. This is common. Characters are pushed by the dark elements, like threats or mysteries, and they grow towards the light, becoming stronger and more morally complex.
Well, in many such novels, the author might use it as a plot device to create drama. The hero might be tempted due to some misunderstanding or external influence, but then realizes his true feelings for the heroine at the last moment. This adds tension and keeps the readers on the edge of their seats.
One possible reaction could be Tony's heartbreak. He might feel betrayed and angry, leading to a rift in his relationship with Steve. He could also become distrustful of others in the future.
There's also 'Unfaithful Hearts' which focuses on the reactions of their friends and the wider community within the fanfiction world. It's not just about Steve and Tony, but how their situation impacts everyone around them.
Steve might compare Tony to Howard based on their personalities or leadership styles. Maybe he points out similarities or contrasts in their decision-making.