The cause of my loss of morality

Facing each other, Fengming and Mei Xin looked at each other. Mei Xin held the ornated wedding fan in front of her eyes and lowered her eyelids. Following the rituals, they both were wedded and were officially called husband & wife. This was the first time a couple married at night. 

Fengming paid the said amount to the middle-aged man. He asked for their names as he needed to write them on his register. 

"I am Jin Fengming and this is Mei Xin." As soon as he introduced them to the middle-aged man, he widened his eyes in shock. He immediately recognized Fengming because of the family name he mentioned. 

But then, he wondered why would such a prestigious Jin Family's son marry in the middle of the night to a random woman. Without putting much thought, he registered Jin Fengming's name along with Mei Xin in the register.