In Postcards from the Edge, it was revealed that she and her sister had siphoned bits of magic from Caroline's body for a long time, but as they grew in her womb, they siphoned out more and more magic, until Caroline began to desiccate. It was also revealed that Caroline Forbes is currently pregnant with the twins. In Best Served Cold, it is revealed by Valerie Tulle that the twins actually survived Kai's attack on Jo, due to the fact that the Gemini Coven performed a spell to save the twins.