Complex sentence: The two begin to talk, and Lady Covington reveals to Madeline that she carved her name under Madeline's bed, Marie-Gilberte, and asks Madeline to see if it's still there.
Split into simpler sentences: The two begin to talk, and Lady Covington reveals to Madeline that she carved her name under Madeline's bed, Marie-Gilberte. She asks Madeline to see if it's still there.