Gu Kaiyuan really had absolutely no interest in other women. He was highly fastidious, both emotionally and physically. But he couldn't say these things to his wife. Otherwise, she might think there was something wrong with him. What if she didn't want him anymore?
Bai Suihe also knew that nobody was perfect. In the modern era, those men who appeared deeply affectionate and devoted to their wives and families on the surface still engaged in petty affairs behind closed doors. Between people, every act of trust was like a gamble. It was exactly the same here in ancient times. Even legal constraints couldn't keep those men honest, let alone some written agreement.
