I think it's a rather dark and unfaithful take on the characters. In the original Harry Potter lore, Lily was in love with James. However, fanfiction is all about exploring different possibilities, but this one might not sit well with a lot of fans who have a more traditional view of the relationships.
It's an interesting but controversial concept. On one hand, it shows the creativity of fanfiction writers to explore such an unexpected relationship dynamic. But on the other hand, it goes against the established relationships in the original story. It might also make some fans uncomfortable as it involves cheating, which is generally not a positive or morally - upstanding theme. But if it's written well, it could potentially add a new layer of complexity to the characters and their relationships.
I think this is a rather complex and not - so - positive concept for fanfiction. The relationships between Lily, James, and Snape in the Harry Potter universe are already very nuanced. While fanfiction gives creative license, a story where Lily cheats on James with Snape might deviate a lot from the core values that many fans hold dear. But if you're determined to find it, try using different search terms related to the characters and the situation on fanfiction search engines. For example, you could try 'Lily and Snape relationship fanfiction' and then sift through the results to see if there are any that fit your specific idea.
There are various fanfiction stories with this theme. Some might explore the emotional turmoil of Lily finding out, while others could focus on how the wizarding community reacts to such a scandal.
Guilt and redemption can be a theme too. Snape's actions were often driven by his love for Lily and his guilt over her death. Fanfictions may expand on this, showing how he tries to make up for it in different ways. Also, the theme of loyalty - Snape's loyalty to Lily even after her death is a powerful concept that fanfictions often explore, sometimes by creating scenarios where Lily somehow comes back or is still present in a way that tests Snape's loyalty.
Love and jealousy are very common themes. Snape's unrequited love for Lily while she is with James creates a lot of jealousy. It often drives the plot as Snape's actions are influenced by his feelings.
In many fanfictions, Snape's jealousy of James and Lily can be deeply rooted in his unrequited love for Lily. Snape had a complex relationship with Lily from their childhood. He loved her deeply, but she fell in love with James. This led to his intense jealousy. His envy towards James was not just about Lily's love, but also about James' popularity and charm which Snape felt he lacked.
Unrequited love is a very common theme. Snape's love for Lily that was never fully reciprocated is often explored in depth. It adds a lot of emotional depth to the stories.
Snape's view of James might not change much at first. He has such deep - seated hatred for James due to their past. But if the fanfiction shows James in a more positive or sympathetic light, he may start to question his long - held beliefs about him, just a little bit.
It's a really odd concept. Snape and Harry have a very specific relationship in the Potter universe. Snape was Harry's teacher and had a lot of his own backstory tied to Harry's parents. Cheating implies a romantic or unfaithful relationship which doesn't make sense in the context of their relationship in the books.
In fanfiction, if Snape walked in on Lily and James, it could lead to a very intense confrontation. Snape, who had deep feelings for Lily, would likely be filled with a mix of jealousy, anger, and heartbreak. He might lash out at James verbally or even try to use magic against him. Lily, on the other hand, would be in a difficult position, caught between her old friend Snape and her new love James. It could also potentially change the dynamics of their relationships in the fanfiction world, perhaps causing Lily to re - evaluate her friendship with Snape or making James more protective of Lily around Snape.
It can be considered common in the realm of Harry Potter fanfiction. Snape's love for Lily was so profound that imagining him saving her and James, despite their differences, is a fascinating plot point. Many fans are drawn to exploring the untapped potential of this scenario in their own creative works.