This Happens When I've Already Taken off My Pants

After taking off everything that was in the way, Yue Tingfeng rushed to get on top of her again. 

Yan Qingsi shut her eyes. Forget it, since it was impossible to avoid this, this was going to happen anytime soon. Why fight it? Let it happen then. 

Besides, they had seen each other naked before anyway. They did so three years ago. 

Yan Qingsi already gave in - but at this moment, "Duang Duang!", someone knocked on the door. 

Madam Yue's voice could be heard from outside the door. "Son, Tingfeng, open the door, mom made you your favorite dishes. I have already reheated them for you, come out and have some."

Yue Tingfeng was ready with everything but was interrupted by this voice. 

His expression at the time was so brilliant that Yan Qingsi could not think of any adjectives for it. 

Yue Tingfeng's expression was scarily dark. He had already taken off his pants, what was his mother doing here?

Was it to ruin the fun for her son?