There are many possible reasons in fanfiction for Peter to be jealous of Morgan. Morgan is Tony's biological daughter, and in some stories, she may be shown as having a more stable and uncomplicated relationship with Tony. Peter, on the other hand, has to prove himself constantly as Spider - Man. He may feel that Morgan has an effortless connection with Tony that he can't have, which can lead to feelings of jealousy.
Yes, he could be. Imagine Peter seeing Morgan as this new addition to Tony's life. Morgan might have a more 'normal' family relationship with Tony compared to Peter. Peter has his own insecurities and superhero life to deal with. If in the fanfic, Morgan is presented as having an easy and close bond with Tony, Peter might feel jealous as he's constantly struggling to fit into Tony's world while also handling his own.
Maybe Peter sees Harley having something he desires in the fanfiction, like more popularity or a closer relationship with a certain character.
One possible reason could be that Morgan gets more attention from Tony Stark. Peter Parker sees Tony as a mentor and father figure, and if Morgan is getting all the love and focus from Tony, it might make Peter jealous. For example, if Tony is spending more time teaching Morgan new things or just being with her while Peter feels left out.
His relationship with Morgan herself could also be affected. He might not be as kind to her as he should be. Instead of seeing her as a little girl who just happens to be in a situation where she gets a lot of attention, he could start to resent her, which would make their interactions awkward and uncomfortable.
Well, in some fanfictions, Morgan might hate Peter because she could be jealous of the attention he gets from the other Avengers or people around them. Maybe she feels that Peter is taking away the spotlight from her or her family in some way.
Maybe Tony has to focus more on Morgan's needs at that moment and doesn't have enough time for Peter.
Peter could be a character with some heroic or special qualities. He might be a young man with a big heart. Morgan could be a young girl, perhaps a student at the school. They could have a special bond, like an older brother - like figure (Peter) and a younger sister - like figure (Morgan).
Well, it could be that Tony is focused on protecting Morgan and sees Peter as capable of handling himself, which leads to him ignoring Peter. And Peter might get hurt in a dangerous situation that he wasn't fully prepared for.
Peter could be any character named Peter in a particular fanfiction. He might take out a hit at a bar if he's a morally corrupt character or if he has a strong vendetta against someone who frequents the bar.
One common theme is family. Since they are related in the source material, fanfictions often explore their family bond, whether it's a protective older - younger sibling relationship or just a strong family connection.
One great 'Morgan and Peter Parker fanfiction' is 'The Unlikely Bond'. It beautifully explores their relationship in a post - Endgame world. The story focuses on how Morgan, with her Stark - like intelligence, helps Peter with his scientific projects at school. Another good one is 'Morgan's Protector'. In this, Peter takes on the role of protecting Morgan from threats that emerge due to her connection to Stark Industries. There's also 'A New Friendship' which shows how they gradually become friends and support each other through their respective traumas.