One possible plotline could be Peter showing off his Spider - Man powers to his friends at a party. He might do some cool acrobatics and web - slinging tricks to amaze them.
Fanfiction about Peter and MJ in the context of Spiderman and Spiderwoman often plays with different timelines and universes. For instance, there could be a fanfic set in an alternate universe where MJ has superpowers too. This would change the dynamics of their relationship completely. Writers can also explore how Peter and MJ interact with Spiderwoman in these fictional stories.
I'm not sure specifically which 'Peter shows off Spider - Man fanfiction' you're referring to. There are many fanfictions out there with different takes on Peter and his relationship with his Spider - Man identity. Some might show him showing off his powers to impress friends, while others could be more about him flaunting his superhero status in the context of the Marvel universe's complex social dynamics.
One idea could be that Peter Parker gets injured while fighting a powerful villain and ends up in the hospital. His friends and family are worried sick. Meanwhile, his identity as Spiderman is at risk of being exposed as the hospital staff might notice his super - human physiology during treatment.
In many fanfictions where Peter's identity is revealed, it often leads to a whole new set of challenges for him. His friends and family might be in danger. For example, in some stories, villains target Aunt May to get to Peter. This forces Peter to be more protective and also changes his dynamic with his friends. They might either support him wholeheartedly or be scared of the danger he brings.
Gwen could have a huge impact on Peter's story. She could give him emotional support, which Peter often lacks. In Spiderman 3, Peter goes through a lot, and Gwen could be the stable presence he needs.
Peter might be in the hospital because of a fight with the Green Goblin. He has some serious injuries but he's constantly worried about getting back out there to protect the city. His Aunt May is by his side, scolding him a bit for always getting into dangerous situations but also being very proud of him.
Their relationship can be developed by having them go through shared challenges. For example, when they face a powerful enemy together. This can create a bond as they rely on each other's skills. Another way is through trust - building moments. Maybe Peter reveals a secret about his powers to Felicia, and she in turn shares something about her past.
A popular one is 'Web of Love'. This fanfiction delves deep into the emotional connection between Peter and Michelle. It has detailed descriptions of their feelings, from the initial attraction to the deep love that develops over time. It also weaves in the Spiderman aspect really well, with Peter having to balance his superhero duties and his love for Michelle.
Often, Peter has to face new enemies. Since his identity is out, villains who were previously afraid of him being anonymous now come out of the woodwork. They see it as an opportunity to take him down when he's vulnerable.