Well, sometimes in this type of fanfiction, Sasuke might punish Sakura for not following his orders during a battle. He could exclude her from future team activities as a form of punishment. Also, if Sakura makes assumptions about his feelings without his consent, Sasuke may punish her by ignoring her for a while.
In some stories, Sasuke punishes Sakura for being too nosy about his past. He might leave her behind on a journey or not share important information with her. This is often used to show his cold and brooding nature, while also exploring Sakura's growth as she tries to understand his actions and improve herself.
The relationship often becomes more strained. Sasuke's punishment can make Sakura feel resentful at first. But over time, it can also lead to her becoming more independent as she tries to prove herself to him.
One common plotline could be Sasuke making a decision without consulting Sakura, like leaving the village again. This would make Sakura angry as she feels left behind and not part of his plans. Another could be Sasuke showing more interest in his revenge goals over their relationship, causing Sakura to feel unimportant and thus angry.
In some fanfictions, it could be that Sakura is under a genjutsu (illusion technique). The genjutsu makes her act in ways that seem like she is cheating on Sasuke. She doesn't realize what she is doing until it's almost too late, and Sasuke has to figure out what is really going on to save their relationship.
One interesting plotline could be Sasuke and Sakura's journey in rebuilding their relationship after years of separation. They might face challenges like dealing with Sasuke's past traumas and how it affects their new family life. Another could be Sakura using her medical skills to help in their village while Sasuke is away on missions, and they communicate through letters, strengthening their bond.
One interesting plotline could be Sasuke finally fully realizing Sakura's unwavering love for him during his travels and coming back to the village to start a relationship. He might see how much she has grown as a kunoichi and as a person, and that could spark his romantic feelings.
One interesting plotline could be their adjustment to domestic life. For example, Sasuke might struggle with being more open and communicative at home, while Sakura tries to make their house a warm and loving place. They could also face challenges from outside, like threats to their family which they have to overcome together.
One popular plotline could be Sasuke and Sakura facing a powerful supernatural curse that is plaguing their village. They have to use their unique skills and newfound supernatural abilities to break the curse. For example, Sasuke might discover he can control dark spirits and Sakura can heal spiritual wounds.
A common family - friendly plotline is their wedding and the events leading up to it. It can include things like Sakura choosing her wedding dress, Sasuke getting advice from his friends on how to be a good husband, and their friends and family preparing for the big day. Another plotline could be them having a baby and the challenges and joys that come with raising a child in the ninja world, like teaching the child ninjutsu or protecting them from potential threats.
A plotline could be that there is a powerful new enemy that specifically targets their bonds. This enemy uses illusions and mind - control to try and turn Sasuke against Naruto, or make Sakura distrust Kakashi. They have to fight not only the physical attacks of this enemy but also the mental and emotional turmoil it causes within their group. In the end, they realize the true strength of their relationships and are able to defeat the enemy.
One interesting plotline could be them initially struggling with their new family dynamic. For example, Sasuke might be distant and cold at first, while Sakura tries hard to build a connection. Another could be them facing challenges together from school bullies who target them because of their new family situation. And there could also be a plot where they discover a shared interest in something like martial arts and it helps them bond.