One idea could be that they discover the pregnancy and start preparing their home for the new arrival. Shikamaru might be initially worried about how fatherhood will change his laid - back lifestyle but then realizes how much he wants to be there for his family. Temari could be dealing with her own concerns about motherhood while also being excited.
Another plot could be that they keep the pregnancy a secret at first. Shikamaru is worried about how the village will react as he is an important ninja. Temari wants to wait until she is further along. But as time passes, they realize they can't keep it a secret forever and start to tell their closest friends and family.
One plot idea could be the couple preparing for the arrival of their baby. Shikamaru might be thinking of ways to balance his ninja duties with being a father, while Temari could be dealing with the physical and emotional changes of pregnancy. Maybe they face some challenges like the village not being fully supportive at first, but they overcome it together.
It could be some rogue ninjas who see Temari's pregnancy as a vulnerability and try to target her or Shikamaru. They might think that a pregnant Temari would be an easy target and that Shikamaru would be distracted, so they could try to carry out some evil plan against them.
Their relationship would likely become more intimate. They would have to rely on each other more, sharing fears and hopes for the future with the baby. Shikamaru might become more protective of Temari.
One possible plot could be that they go on a mission together. Shikamaru's strategic mind and Temari's powerful wind jutsu would make them a great team. They might face a powerful enemy that requires both their skills to defeat. Along the way, they start to understand each other more deeply and their relationship begins to develop into something more than just comrades.
One idea could be that Shikamaru and Temari have to go on a joint mission in a foreign land. They face various challenges together which make them rely on each other's skills. Shikamaru uses his intelligence to outwit the enemies while Temari uses her wind jutsu. This mission brings them closer and they start to develop deeper feelings for each other.
A good Shikamaru and Temari fanfic should have well - developed characters. Since we already know their personalities from the original series, the fanfic should expand on them. For example, showing more of Shikamaru's hidden emotions and Temari's softer side. Also, a great plot is essential. It could involve some sort of conflict that they have to overcome together, whether it's an external threat or internal doubts about their relationship.
Their friends would react in different ways. Lee would be extremely enthusiastic, seeing the new life as a symbol of new hope and strength. He might offer to train the baby when it grows up. Tenten could be practical and offer to help Temari with any baby - related gear, like making or finding the best crib. Neji, if he were still alive, would be more reserved but still offer his congratulations and support, perhaps by using his Byakugan to check on the baby's health from time to time in a non - invasive way.
Their contrasting personalities make them appealing. Shikamaru is laid - back and intelligent, while Temari is strong - willed and confident. In fanfic, this contrast can create interesting dynamics, like when Temari challenges Shikamaru and he has to think on his feet to keep up with her.
Maybe there's a serious situation or a misunderstanding that stops Temari from smiling. It might be related to their relationship development or an external event.