Complex sentence: She appears to be warm-hearted and faithful, but was in fact a scheming and adulterous woman who murdered her husband with the help of Bai Shijing and plotted the downfall of Xiao Feng.
Split into simpler sentences: She appears to be warm-hearted and faithful, but is in fact scheming and adulterous. She murders her husband with the help of Bai Shijing and plots the downfall of Xiao Feng.