Elva Hsiao and Vaness Wu's brother-in-law, Elroy Cheo have a high profile relationship and are often seen together lovingly.
Last December, Elva was in China recording a variety programme "Road to Star" and Elroy was seen at the spectator seat, showing support to his girlfriend.
Just early this month, Elroy accompanied Elva when she had a show in Macau, reports Asian Pop News.
The couple was seen at a casino in Macau as well.
However, the couple was recently suspected to have a tiff after Elva suddenly cancelled a birthday celebration for Elroy when she had originally planned for the party next week.
Elroy also suddenly unfollowed Elva on her Instagram, which raised speculations if the couple had broken up.
A source close to the couple revealed that they had quarreled after having a difference in opinion on a friend's matter.
Elva's fans have since blasted Elroy for his "ungentlemanly act" to unfollow his girlfriend on Instagram.
One netizen said:
"It's so childish to unfollow after a quarrel."