Seeing how the old woman died while hugging her was the most terrifying experience she had ever had in her life. Her entire body was covered in thorns even when she was in human form, and Sharass used that fact to punish her.
Maybe Sharass had indeed let her live instead of killing her fourteen years ago, but the torment her mind had to endure in the past fourteen years was even greater than instant death.
The old woman was insane, and she immediately hugged Princess Ievna without thinking when she thought the princess was her daughter. The old lady immediately screamed in pain as her body touched the princess, but Sharass didn't let her get away from the princess by using her magic.