In the long run, they might realize that they need to change their behavior. They could start thinking about how to make it up to Chichi. Maybe they'll go and do some nice things for her, like getting her some flowers or cleaning the house really well without being asked. This would show that they've learned their lesson and are trying to be better sons.
Since the term 'lemon' is associated with mature content, we should focus on the positive aspects of Gohan and Goten. They could be in a story where they train together, face new enemies, and grow stronger as Saiyans. That would be a more appropriate and exciting plot than what a 'lemon fanfic' might suggest.
Well, I've come across a few. Some explore Goku Black's relationship with Goten in really unique ways. For example, there are stories where Goku Black has a change of heart due to his interactions with Goten. It's really fascinating to see how different authors play with their characters' personalities and the overall Dragon Ball universe in these fanfictions.
In some fanfictions, Gohan and Goku might have a series of conversations that open up new levels of understanding between them. Gohan could share his thoughts and feelings about his life and future, and Goku would listen and offer his own insights. This kind of communication can really strengthen their bond.
In such fanfictions, Goku might develop by becoming more of a mentor to Gohan. He could teach Gohan new fighting moves and also how to control his emotions better during battles.
In a Gohan x Goku fanfic, their relationship can be delved into by creating scenarios where they have to rely on each other completely. For example, if they are in a situation where Goku's strength and Gohan's intelligence are both required to escape. Their different personalities can also be highlighted. Goku's carefree nature contrasted with Gohan's more studious and responsible side. And of course, flashbacks to Gohan's childhood and how Goku's presence or absence affected him can add depth to their relationship.
Typically, 'lemon' fanfics involve inappropriate content. However, if we were to hypothetically look for positive aspects, perhaps it could inspire some to write more appropriate stories about Gohan and Goten's brotherly bond, but that's stretching it as the 'lemon' aspect overshadows any potential good.
Another fanfic could be 'Growing Up Together'. It would likely depict their childhood memories, like the times they played together, and then show how their relationship evolves as they grow older. It might also touch on how they deal with the expectations placed on them as Saiyans.
One possible interaction is that Bardock could spar with Goku and Gohan. He'd test their limits and see how much they've learned about fighting. Another could be Bardock sharing stories of Planet Vegeta with them, which would be really interesting for Goku and Gohan to hear.