There is nothing wrong or sinful about women working. Indeed, women are a tremendous benefit to the companies who hire them: “women have much to offer the world of work, not because women are the same as men, but precisely because they are not.” Similarly, having a mom at home can also be tremendously beneficial to the family.
This is definitely a decision best left up to the family. There is no one size fits all solution.
In my case, I decided to take some time off working to be at home with my children while they were very small. I’m getting ready to go back to work at the end of the year. As a teacher, there will be enough flexibility in my workday to prioritize my family when I need to.