Self - discovery is also a theme. As they interact and face different situations, both Scott and Allison often discover new things about themselves, which in turn affects their relationship with each other.
Love and loss are common themes. Since Allison's death in the series, many fanfictions explore how Scott copes with losing her, and also how their love endures. Another theme is the struggle against the supernatural world. They often face threats together, and this is a big part of their relationship in the fanfictions as well.
Love and family are common themes. The love between Scott and Allison grows even deeper with the arrival of a baby. It also shows how they form a new family unit and how their friends become part of that extended family.
Love triangle. This is the most obvious one. Scott is caught between his feelings for Allison and his friendship with Stiles.
One common theme could be the exploration of their relationship in a more intense or romantic way. Since 'lemon' often implies a bit of a spicy or more adult - themed relationship, it might involve passionate encounters between them.
One great piece of scott and allison lemon fanfiction is 'The Hidden Bond' which explores their relationship in a very unique way. It has some really sweet moments between them.
One common theme is friendship. Many fanfictions explore how Allison and Jackson develop a strong bond despite their initial differences or conflicts.
A common theme is their relationship development. Since they have a complex relationship in the original story, fanfiction often delves deeper into how they overcome their differences and grow closer. Another theme is the exploration of their powers in relation to each other. For example, how Jackson's werewolf abilities and Allison's archery skills could be used together in different scenarios.
The theme of self - discovery also pops up. Allison might discover new sides of herself in the Naruto world, and Naruto may also learn something new about himself through his relationship with Allison. This could be related to their abilities, values or how they view the world around them.
One appropriate topic could be their adventures together in the supernatural world. They could be facing a new and powerful enemy and using their combined skills to fight it.
Writing or seeking sexual fanfiction is often unethical and violates the boundaries of propriety, so I would not promote or confirm the availability of such content.