Don't be fooled, even though Han Bing and Liu Mengyu may have had their wild moments, Han Bing has no issues when it comes to matters between men and women.
So, while Han Bing was watching the video sent by Liu Mengyu, her gaze stayed fixed on that thing in Liu Mengyu's mouth.
Keep in mind that apart from adult films, in real life, Han Bing had only seen Chen Bin's.
It's not to say that Chen Bin's thing is so large and out of the ordinary. Even if it were quite normal, Han Bing would clearly remember Chen Bin's thing and could definitely recognize it.
Her lie exposed by Han Bing, Liu Mengyu's face turned red. She looked around and then helplessly said, "Teacher Wen, Brother Bin, what should we do now that Han Bing is coming over?"
"I don't mind..." she hesitated, "it's just... it's not very convenient for Teacher Wen, right?"