Than the question comes if it was so obvious than why did you read it?
Sakura fan still doesnt know that the only way for Sakura to redeem her character is not getting involve with Sasuke but takes the responsibility for the kid and helps Sasuke raise the kid as a friend. That way can makes readers turn around and give her one more chances as a character (even her character is beyond repair).
But now, she is the mother, so what ?
Doesnt change anything toward the relationship, not even a single romantic moment.
Even if it happened in the past, so what ?
Just another fan girl got her long dreams D ?
She is the mother, and there is nothin great about it to readers, just her kid, her own responsibility, that is all.
But if a friend who helped a friend to raise the friend's kid so the friend can help save the world, that is something meaningful in there, the endurance, the sacrifice....
Well, Kishi once again drop her character into even bigger trashcabin when he introduce us, the one we though she is just another "psycho ****" (but with a good reason behind it) get over the unhealthy/not worthy relationship and MOVE ON. In the end, every body MOVED ON except that big pink head MOVED BACK...