Madame Valamonde and Armand noticed the baby’s dark skin several weeks before Desiree. Can you offer a possible explanation for this gradual increase in pigmentation over the course of three months?

As a mother, Desiree noticed nothing except the beauty of her child. Madame Valamonde and Armand noticed the baby's skin color, and in my opinion, the baby's skin never changed, but rather, they finally came to the belief that though they hoped they were wrong..... they were not.