Murong Rou'er obviously had not noticed the old man who was emerging from the room as she continued to act pitifully towards Murong Yan, "Yan'er, I've always treated you with kindness, why are you framing me? I know, it must be because of your two friends! They're harboring ill intentions towards the Murong family so they're using you! Elder Er, you mustn't blame Yan'er, she's still too young and can be pardoned for allowing others to manipulate her."
At the end of the day, Murong Rou'er displayed an enlightened manner and acted as if she were afraid that Elder Er would blame the naive and innocent Murong Yan. She played it as if she had tried to stick up for her little sister out of the kindness of her heart.
If Murong Yan had not discovered this woman's true colors, she would certainly have been fooled by her little charade!