There could be a plot twist where Ayame turns out to be a key figure in an ancient prophecy related to the Hidden Leaf Village. Her marriage to Naruto is part of fulfilling that prophecy, but there are forces that don't want this to happen. So they try to stop the wedding. This could lead to a series of battles and challenges that Naruto and Ayame have to face together, ultimately strengthening their bond in the process.
A plot twist could be that an old enemy of Naruto targets Ayame to get revenge on him. This forces Naruto to not only protect his new wife but also to re - evaluate his past actions and make amends if possible to prevent further harm to his family.
A plot twist could be that Ayame is actually part of a prophecy related to Naruto. For example, their marriage is foretold to bring either great prosperity or great disaster to the Hidden Leaf Village. This makes their relationship more than just a love story and puts a lot of pressure on them, as they have to figure out how to fulfill the prophecy in a positive way.
A possible plot twist in Naruto and Hinata married fanfiction is that they find out there is a prophecy related to their union that affects the entire ninja world. Or perhaps, an old enemy resurfaces and targets Hinata because of her connection to Naruto. This forces Naruto to make difficult choices between protecting the village and saving his wife. Also, there could be a situation where Hinata's family disapproves of something Naruto does as Hokage, creating tension in their marriage.
One possible plot twist could be that just before the wedding, Ayame discovers a long - lost relative who has some dark secrets about Kouga's family. This relative tries to stop the wedding by revealing these secrets to Ayame. Another could be that on the wedding day, an old enemy of Kouga shows up and challenges him to a fight, putting the wedding on hold. Or perhaps there is a misunderstanding where Ayame thinks Kouga has betrayed her trust in some way, like he made a deal with an enemy for the sake of the tribe but didn't tell her.
One interesting plot idea could be that Naruto, while on an Anbu mission, has to protect Ayame. Maybe there's a group of rogue ninjas targeting the local businesses in Konoha, including Ayame's ramen shop. Naruto uses his Anbu skills, which are more stealthy and deadly than his normal abilities, to keep her safe. Along the way, Ayame discovers a new side of Naruto she never knew, and they start to develop a deeper bond.
A plot could involve Ayame getting kidnapped by a group who wants to use her knowledge of the village's food supply (since she runs the ramen shop) to starve the village. Naruto then has to rescue her. This would not only show Naruto's heroism but also Ayame's importance in the village in a different way than just being a ramen seller.
A more complex plot could be set in a time when there is a famine in the village. Ayame's ramen shop is struggling to get ingredients. Naruto, being the hero he is, offers to help. They travel to different lands to trade for ramen ingredients. Along the way, they encounter various characters from other villages, some friendly and some hostile. This journey not only strengthens their friendship but also helps to save the ramen shop and feed the village.
Perhaps in the fanfiction, Naruto and Ayame start a mission together that leads to them getting stranded in a strange land. There, they gradually form a harem as they meet various characters who are attracted to their unique qualities and the bond between them.
Well, in some Naruto and Ayame fanfiction, they could be paired up to solve a mystery within the village. For example, there might be a series of strange disappearances that only they seem to notice. They start investigating and find out that it's related to an old, forgotten jutsu. In other fanfictions, Ayame might be in danger and Naruto uses his skills and determination to protect her. This could lead to a deepening of their relationship as they realize how much they care for each other.
There could also be a fanfiction where Ayame discovers she has some hidden ninja abilities and Naruto helps her train. Along the way, they develop a deeper bond and friendship, facing challenges together and learning more about each other's pasts and dreams.