Naomi laughed at his words.

"What's the matter? Why do you look so well-behaved today? Have you done something bad behind my back?" Naomi asked jokingly.

Nelson was nervous for a moment, "What?"

"That's what my colleague said! When a boyfriend suddenly treats his girlfriend well, he must have done something bad to her!"

Nelson breathed a sigh of relief, "Then, what wrongful act could I have possibly done?"

Naomi thought for a moment and said, "Who knows? You could be having an affair behind my back, or maybe you're hooking up with another girl!"

Exasperated, Nelson retorted, "How would I have the time?"

"Oh, so it's because you don't...