Celie starts her letter letting us know that her mother has died, but she also gives us some information on what happened before her mother passed away.
Celie’s mom is pretty critical of her daughter, and also wants to know who is the daddy of Celie’s baby is. Celie answers, "God."
After Celie gives birth (OK, Celie puts it this way: "then that little baby come out my pussy"), her mom wants to know where the baby went. Celie says, "God took it" (read: Pa got rid of the baby to hide the evidence that he’s a child molester).