Surprisingly, it was Bai Chen who first noticed the presence of another person witnessing how shameless Wu Jinhai was. Thus, he gulped nervously as his eyes lingered on that person, and he also tried to push Wu Jinhai away from him.
"You... it's your father, Wu Jinhai! Release me immediately!" Panicked, Bai Chen tried to tell Wu Jinhai that it was indeed Emperor Wu Shun who witnessed their intimate activities in broad daylight.
And it would be wrong to say that Bai Chen was the first to notice Wu Shun's presence because Wu Jinhai had long noticed that his father was looking at him and Bai Chen from afar. That was why he was able to continue to tease Bai Chen's neck even after hearing the owner of the neck trying to frantically explain to him.
So what if the old Emperor witnessed their activities from afar? Perhaps that was what Wu Jinhai thought as he refused to stop what he was doing.