Yeah Sakura was so happy alone...best times of her life...That was before she had a child and it was smart...you should always bring a medic, and when she went with Sasuke, she got pregnant, he couldn't resist her beauty.
Knowing demision hoping was no way to raise a child, and it wasn't safe if a threat arised, she stayed in the leaf to raise her, knowing if they were to visit Sasuke, she'd end up pregnant again
She clearly want to experience it again.