Well, it could be a story about Jon and Sansa having an adventure together and somehow a lemon (which might symbolize something refreshing or new in their journey) comes into play. Maybe they find a lemon tree in a strange land they are exploring and it has some magical properties that help them in their quest.
Perhaps it's a fanfic where the relationship between Jon and Sansa is explored through the use of a lemon as a motif. The lemon could represent the sourness or difficulties they face in their relationship at first. For example, they might have some misunderstandings like a sour lemon, but as the story progresses, they work through them and their relationship sweetens.
A 'jon x sansa lemon fanfic' might be characterized by its exploration of the physical aspect of their relationship. However, this is a rather niche and often frowned - upon type of fanfic due to its adult - themed nature. In a more positive light, if written well, it could also delve into the deep emotional bond between Jon and Sansa and how that translates into a more intimate relationship, but still, it's not a mainstream or family - friendly type of story.
A possible theme could be discovery. The lemon could be something new that Jon and Sansa discover together, and through that discovery, they learn more about themselves and each other.
I'm not sure specifically about a 'jon x sansa lemon fanfic'. However, many fanfic platforms have a wide variety of stories related to Jon and Sansa. You can try websites like Archive of Our Own. Just be aware that when looking for fanfics, make sure they follow the platform's rules and guidelines.
One popular Jon and Sansa lemon fanfiction might be 'A Winter's Love'. It beautifully weaves their complex relationship with some romantic and intense scenes. However, it's important to note that fanfictions vary greatly in quality and content.
Since 'lemon' content is inappropriate, we can talk about common themes in regular Jon and Sansa fanfiction. One common theme is their reunion. After being apart for a long time in the story, their reunion can be full of emotions. Another theme is their cooperation in ruling the North. They both have a deep connection to the North, and their joint rule is often explored.
One possible plot could be that Jon and Sansa's union is a political move at first, but then they truly fall in love. When Sansa becomes pregnant, they face opposition from other houses who fear their combined power. They then have to fight to protect their family and the future of their child.
One common theme might be the exploration of their complex relationship. Given their family ties and the history in the 'Game of Thrones' universe, fanfics might delve into how they overcome those obstacles in a romantic and often passionate way.
Another aspect is their political roles. Sansa is a smart political player, and Jon has his own leadership qualities. Fanfictions could explore how they combine their skills to rule the North. They might face challenges from other houses or political intrigues, and their relationship could be tested and strengthened through these situations.
I'm not really into that kind of fanfiction, but you could try searching on popular fanfiction websites like Archive of Our Own. They usually have a wide variety of fanfics, and you might be able to find some 'Jon x Sansa' ones there.
The forbidden love aspect. In the original story, their relationship is complex. Fanfics that explore Sansa loving Jon play on this complexity and make it into a romantic and exciting story.