What happened to Christine Daae's mother?

i think that she was captured

Her mother died after giving birth to Cinderella

She died

Mother Teresa's sister would take care of her mother then her mother died and after the death of her mother, Mother Teresa's sister had died!

Francis and Epsilon don't have a mother. They are clones of the "perfect agent" found 100 years ago. When Francis gets older, he will get a "Francis" of his own to raise the way Epsilon raised him.