In the long run, this confrontation could be a turning point. If they overcome their differences, it could lead to a deeper and more mature relationship. For example, they might start to respect each other's views more and work together more effectively in future adventures.
It could be related to a mission. Suppose Naruto's arm has some special power or ability that is crucial for a mission, but Sakura disagrees with how Naruto is using or handling it, thus causing the confrontation.
Maybe Naruto has discovered something about Sakura that goes against his values. His arm could be a physical manifestation of his strength and determination to confront her about it. For example, if Sakura was involved in something unethical in the fanfiction, Naruto's confrontation through his arm could be a way to set things straight.
Naruto's reaction could be complex. Since he has his own feelings for Sakura, this situation could stir up a lot inside him. He might initially be a bit hesitant in how to approach her because he doesn't want to overstep any boundaries. But in the end, his natural instinct to help a friend would take over. He would listen attentively to Sakura, his eyes full of determination to make her feel better, and use his own unique way of thinking to give her advice or just be a shoulder to cry on.
In the fanfiction, their relationship may grow in a more romantic way. Away from the distractions of the village, they are forced to confront their feelings for each other. Maybe they share more intimate moments as they face hardships together, and Naruto's long - held feelings for Sakura might finally be reciprocated.
They become more united as they face the challenges of parenting together. Their relationship deepens as they share the joys and sorrows of raising a child.
It often changes drastically. Sakura may initially feel hurt and angry. She might start to question all her previous beliefs about Naruto. For example, if Naruto betrays her trust in a battle situation by seemingly siding with the enemy, Sakura's view of him as a reliable friend and teammate would be shattered.
It can create a rift. Sakura might be hurt by Naruto's outburst and start to distance herself from him. This could lead to a period of coldness between them where they don't communicate as much.
It can strain their relationship. Naruto's jealousy might make Sakura feel suffocated. For example, if he's constantly interrupting her time with others. But it could also make Sakura realize Naruto's deep feelings for her. If she understands his jealousy is coming from a place of love, it could bring them closer.
On the other hand, her jealousy could also be a driving force for her to improve herself. She might see Naruto's success and instead of just being jealous, use it as motivation to become stronger. This could lead to a more equal relationship in the long run, as she catches up to him in terms of skills and abilities.
It could potentially improve their relationship. Since Naruto is not involved with Sakura, there's no love triangle tension between them regarding Sakura. This might allow Naruto and Sasuke to focus more on their own friendship and mutual respect.