There might be a fanfiction where Harry's other aunt has a prophecy related to Harry. She could be the one who holds the key to Harry's ultimate destiny, perhaps a destiny that goes beyond just defeating Voldemort. In this fanfiction, she might be trying to guide Harry in a different way than Dumbledore, which could lead to a lot of internal conflict for Harry as he has to decide who to trust more.
In the fanfiction, they could be forced to work together on a project related to lemons. Maybe there's a local fair that requires everyone to contribute something lemon - themed. Through this shared task, they begin to understand each other better. Harry realizes that Aunt Marge has her own insecurities and Aunt Marge sees that Harry is not the troublemaker she thought he was. For instance, Harry could show his creativity and intelligence during the project, impressing Aunt Marge.
One possible fanfiction could be about Aunt Petunia having a strange encounter with a lemon - themed magical object. Maybe she accidentally uses it in a spell (in a non - canon, fan - created way) that makes her see a different side of the wizarding world she has always despised. This could lead to her having a change of heart about Harry Potter and his world.
Aunt Lemon might also impact Harry's life by introducing him to a different side of the Muggle world. Maybe she has a love for art or music, and through her, Harry discovers these aspects of Muggle culture that he otherwise would have been deprived of. This newfound interest could help him better understand the differences between Muggles and wizards and appreciate both worlds.
In some fanfictions, his other aunt might be a key figure in a hidden wizarding society. She could be part of a group that has been observing Harry from afar, waiting for the right moment to bring him into their fold and teach him things that Dumbledore or others haven't. For example, she might know ancient spells that can unlock hidden powers within Harry.
One possible fanfiction could be about Aunt Petunia discovering her latent witch powers late in life. Maybe she starts having strange dreams that lead her to an old family heirloom that unlocks her magical abilities. She then has to deal with the shock of it all while also trying to keep it a secret from the Muggle world around her.
Well, it could be quite strange. Maybe she's secretly a bit more interested in the wizarding world than she lets on. It might be a way for her to explore the stories from a different perspective, one that's not as judgmental as her usual self towards magic.
There could be a fanfiction where Aunt Marge discovers she has some magical ability herself. This would completely change her view of the wizarding world and her relationship with Harry. She might end up joining Harry on some of his adventures, much to everyone's surprise.
Aunt Petunia could discover a lemon tree in her garden that has magical properties. Since she's always been envious of the magical world (even if she doesn't admit it), she might try to use the lemons from the tree to gain some sort of power or advantage. For example, she could think that if she eats the lemons, she'll become more beautiful like the witches she's seen in Harry's pictures.
Yes, there might be such fanfictions out there. The Harry Potter fandom is vast and creative, and many fans like to explore unique and unexpected relationships in their stories. Some fanfic writers might find the idea of an aunt of Harry's marrying Severus an interesting plot twist to explore different character dynamics and storylines.