When my son was around 6 years old he came to me one day and said, "Mommy, I just realized you're not perfect! But that's okay Jesus died for you too!"
There are not perfect mothers. It was fun knowing that my son thought I was perfect. Even for a few brief years but reality sets in quick. We all make mistakes. But true joy is knowing that even in our imperfection, we are still God's perfect choice to raise HIS children.
So whether our mistakes are large or small, we can rest in the knowledge that we serve a God who is quick to forgive and remember them no more. (And thankfully children who are usually just as willing.)