One possible development is that Sasuke becomes more involved in the village. He realizes he needs to create a stable environment for his family, so he starts to take on more responsibilities in the village.
In some fanfics, Sasuke might initially be shocked. He could then feel a mix of joy and fear. Joy because he's starting a family with Sakura, but fear because of the responsibilities and potential dangers that might come with it.
Sasuke would likely first show a stoic exterior when he finds out. However, internally, he's in turmoil. On one hand, he's happy that he and Sakura are going to have a child. On the other hand, he's worried about the potential dangers his family could face because of his past enemies. So, he might start making plans to keep them safe, like finding a more secure place to live.
In such a fanfic, it might explore the challenges they face. For example, Sasuke's past actions might make some in the village still be wary of him. But Sakura's pregnancy could be a symbol of hope and new beginnings. It could also show how their friends like Naruto react to the news. Naruto, being Sasuke's long - time friend, would likely be overjoyed and offer his support, while also teasing Sasuke about becoming a dad.
Another great one is 'Pregnancy and Promise'. This fanfic emphasizes the promises Sasuke makes to Sakura and their unborn child. It shows the emotional turmoil and the hope that comes with the pregnancy in their relationship.
She might be initially shocked. Sakura has always seen Naruto as a friend, so learning of his romantic feelings could completely change her perspective of him. It could make her re - evaluate all their past interactions.
Some of his other friends might react differently too. Some may be more cautious around him, worried about the power of the jinchuuriki within him. But those who truly trust Naruto, like Shikamaru, might not change their attitude much. They would see that Naruto is still the same person he was before, just with this added aspect to his identity.
He could initially be in disbelief. However, as the reality sinks in, Sasuke would start to show his softer side. He might be more attentive to Sakura's needs, like making sure she eats well and rests. He would also start thinking about how to train their child to be a strong ninja in the future, while also wanting to give the child a more peaceful life than he had.
In a Sakura Cardcaptors fanfic where Chelsea finds out, she might react in different ways. She could be shocked and initially not believe what she has discovered. For example, if she finds out about Sakura's secret cardcaptor identity, she may question how such a thing could be possible in the seemingly ordinary world they live in.