Well, the title gives a few clues. Harry might be in a position where he has to force Petunia to do something. It could be related to protecting his family or friends. For instance, if there's a threat that Petunia is unknowingly involved in, Harry might have to use his magic or his influence to get her to cooperate. It could also be about a more emotional forcing, like making her admit her feelings or her mistakes in the past. This all without any inappropriate or 'lemon' - related content.
I'm not entirely sure as 'lemon' fanfiction often implies inappropriate or non - canon and unethical content. However, if we assume it's a more innocent exploration, perhaps it's a situation where Harry is forcing Petunia to face something she has been avoiding in a particular fan - created storyline. But this is all speculation based on the rather odd title.
Friendship is also a great theme. The relationships between Harry and his teammates can be developed further. Maybe they have some inside jokes, or they help each other with schoolwork aside from Quidditch. These aspects can make for interesting fanfiction stories.
I'm not entirely sure as 'lemon' often implies adult content in fanfiction, but if we assume it's a non - adult take, perhaps Harry could dominate Petunia in terms of magical knowledge. Maybe he shows her the true power of magic and she has to accept his superiority in that regard.
Another plot could be based on a parallel universe concept. In this universe, the rules of magic and relationships are different. Harry and Petunia might have a more complex relationship due to some altered events in their past. For example, if Voldemort had never existed, the Dursleys might have been more open - minded towards Harry's magic, and in the course of some magical experiment or exploration, an event occurs that results in Petunia's pregnancy. However, the story could focus on how they deal with this situation within the context of this very different world, perhaps with a focus on family unity and acceptance rather than inappropriate implications.
I'm afraid I can't really point out particular 'petunia and harry lemon fanfiction' as it might vary in quality and style a great deal. However, when exploring on those platforms, pay attention to the authors who have a good reputation. They are more likely to write engaging and well - written fanfictions. Also, look for ones with high view counts and positive comments.
One popular 'Harry and Petunia' fanfiction is 'A Different Bond'. It explores an alternative relationship between them where they gradually come to understand each other in a way not shown in the original series. Another one could be 'Petunia's Secret'. It delves into Petunia's hidden feelings towards Harry that are more complex than just envy or dislike.
Maybe there's a fanfiction where the lemon is a key ingredient in a potion. Lily was working on this potion before she died, and Petunia knew about it but never told Harry. Harry discovers this secret and starts to research the lemon - based potion. As he delves deeper, he uncovers more about his mother's intentions and the relationship between Lily and Petunia. It could be a story full of mystery and self - discovery.
One common theme could be the exploration of Petunia's hidden feelings. Despite her outward coldness towards Harry, fanfictions might explore her inner turmoil about her sister Lily's death and her role in Harry's life. Another theme could be the clash of the Muggle and wizarding worlds in the context of their relationship. For example, how Petunia's Muggle - centric view affects her perception of Harry.
One possible plot could be Petunia finally coming to terms with Harry's magic and the two of them forging a new, more positive relationship. Maybe she realizes the importance of family and helps Harry in some way, like providing some Muggle - related knowledge that proves useful in his wizarding world adventures.
Another theme could be their self - discovery through their interactions. Rei might start to understand her own emotions better because of Shinji, and Shinji could grow in confidence. In many fanfictions, they might also face challenges together, like dealing with the threats in their environment or the expectations placed on them by others. This can create a strong bond between them that is explored in the story.