Complex sentence: The youngest daughter of Sir Walter, married to Charles Musgrove, is attention-seeking, always looking for ways she might have been slighted or not given her full due, and often claims illness when she is upset.
Split into simpler sentences: The youngest daughter of Sir Walter, married to Charles Musgrove. She is attention-seeking, always looking for ways she might have been slighted or not given her full due, and often claims illness when she is upset.