Naruto would probably be extremely happy and excited. He has always been close to Sakura, and seeing her become a mother would be a big moment for him. He might be there to support her during the birth, bringing some of his positive energy to the situation.
One possible plot twist could be that during the birth, there are some unforeseen complications that put Sakura's life in danger. This would add a lot of drama and tension to the story. Maybe there's a shortage of medical supplies or some sort of enemy attack while she's in labor.
Sarada might be initially shocked and sad. She loves both her parents, and the divorce would be a huge blow to her. She could become withdrawn for a while, not wanting to talk to her friends about it.
Itachi would probably be very calm and composed. He might see Sarada as a symbol of the new generation of ninjas in the village. He could be gentle with her, perhaps sensing her potential and her desire to grow as a ninja.
There's also a chance she meets her own ancestors. This would be a very emotional and educational encounter for her. She could learn about her family's past in a more direct way and maybe discover some long - lost family secrets.
Sarada's relationships would change. If she meets her ancestors or younger versions of people she knows, she'd have to navigate new dynamics. For example, if she meets a young Sakura, she might initially be in awe but then realize that her mother was also a normal ninja once. This would make her respect Sakura even more and also change how she views herself as part of their family legacy.
In fanfiction, the idea of Boruto and Sarada getting married is quite popular. Many fans like to explore this relationship because they have a unique bond in the Naruto universe. Their personalities, with Boruto being adventurous and Sarada being determined, could make for an interesting married couple in fan - created stories.