Why the sudden change?

Song Yan stepped out of the dressing room, dressed in a black split gown with a long V neck, it was adorned with silvery sequins around the neck and bosom while the rest of the dress was left without any extra decoration. 

" How is this one, I think I look pretty good," she told her husband who was tapping on his phone like every other man who was brought to the boutique by their wife. Fu Yu Sheng who was reading finance news on his phone raised his head and looked at Song Yan who was looking a bit too sexy—— because of the spilt in her dress one could see her long, jade leg and if somehow he managed to ignore that, the long V neck that showed the generous swell of her breasts was something he couldn't ignore.