If you work because you need the money, you are a good mother. On the other hand, if you stay at home because you don't want to spend money on childcare, you are also a good mother.
If you work because you need the socialization outside of the home, you are a good mother. If you stay at home because it's a sacrifice you're willing to make, you are also a good mother.
If you work because you love your job or if you stay at home and plan to return to work later, both of you are good mothers.
If you work because your job gives you a creative outlet, you are a good mother. If you stay at home and find other ways to use your creativity, you also are a good mother.
A woman is a good mother, not because she works outside the home or doesn't work outside the home. She is a good mother because she loves her children. Period.
I believe there are some women who are better moms specifically because they work. Not in spite of, but because.
They would be miserable at home all day, and a miserable mother is not as good as a happy one.
The question we need to ask ourselves as we decide whether or not to work outside the home is not "Will I be a good mother if I do this?" Instead, we need to ask ourselves, "Which decision will help me love my kids more?"