There is a fanfic called 'Grown - up Spike: The Dragon's New Role'. In this story, Spike has to take on important responsibilities in Ponyville as he grows up. He helps with various community projects and also deals with some old foes in new ways. It's quite an engaging read as it combines elements of growth, friendship, and adventure.
One common theme is friendship evolution. As they grow up, their friendships change and become more complex. Another theme is career and life choices, like what each Crusader decides to do with their lives based on their cutie marks.
One popular MLP CMC grown - up fanfic could be 'The Mane Six in Adulthood'. It explores how the Cutie Mark Crusaders have grown and how their relationships have evolved over time. It delves into their new challenges and adventures as adults in Equestria.
Another element could be the origin of this relationship. Maybe there was a magical transformation or a special event that made Flurry Heart Spike's mom. This would be important as it sets the foundation for the story. Also, the reactions of other characters in the story to this relationship could be a key element. Do they support it? Are they against it? These reactions can drive the plot forward.
I'm not entirely sure which specific 'flurry heart is spikes mom story' you are referring to. There could be many fictional or fan - made stories with such a concept. It might be from a particular fandom or a creative work that I'm not familiar with.
This is a wuxia novel. The protagonist grew up in a small town and had seven or eight friends. Each of them had different abilities. There was also a girl in the story who had known each other since childhood, and the protagonist had many emotional entanglements with her. I hope you like my recommendation. Muah ~
Adventure is often a theme. The two characters could embark on all sorts of adventures, whether it's exploring a new part of Equestria, going on a quest to find a lost relic, or facing a new threat to the land. Their adventures would not only be exciting but also help them develop as characters and further their relationship.
One possibility could be a story about Twilight Sparkle teaching Flurry Heart about magic. Since Twilight is very knowledgeable in magic, she could be showing Flurry Heart some basic spells or introducing her to the concept of different magical elements. For example, they could go on a journey through Equestria to find a special magical artifact that can help Flurry Heart control her powerful magic better.