Although Feng Qingtian did that to safeguard her from heavenly retribution, he had indeed lied to her.
She found his lies unacceptable even though she was touched by what he did.
They could have discussed it and faced everything together. She wasn't a weak woman who needed to be protected constantly.
Feng Qingtian pulled her into his arms and said, "It's not like that. Did Bai Yunyi say anything to you? Did he recognize you?"
He was nervous. He didn't know what Bai Yunyi thought of Gu Bailu.
He was scared that Bai Yunyi wanted revenge.
Back then, Bai Yunyi had indeed helped her, but she didn't help him when he was tortured in the Fire of Hell.
Later, Feng Qingtian was told that Bai Yunyi's anger had built to the point that he lost his mind, which was why he ordered Bai Yunyi's soul destroyed.
"He didn't recognize me. He simply told me what happened between him and Yan Anchun," said Gu Bailu.