Alvin Chau, casino tycoon and proprietor of Sun Entertainment Culture, recently made a series of public appearances with rumored mistress Mandy Lieu. This instigated Candy Chau, Alvin's sister, to express her frustration about their affair on social media.

"You are so despicable and shameless," wrote Candy on her official Facebook account. The public immediately interpreted this as an indirect message to Lieu.

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This comes barely a month after Heidi Chan, Alvin's estranged wife, announced her plans to divorce the casino magnate.

Alvin and Lieu have been tabloid fodder since their affair became public in 2014, with dozens of sightings of the couple holding hands together after the former model gave birth to their daughter in London.

The couple was recently spotted in Phuket, Thailand with their eight-month-old daughter enjoying a vacation. There are speculations that Lieu might be pregnant with Alvin's second child.

Heidi initially accepted her husband's issues with infidelity, saying that all men have the innate desire to cheat. Heidi was also pregnant with Alvin's child at that time.

However, Heidi recently revealed that their marriage could not be saved, even with persuasion from Alvin's family to stay and change her mind about the divorce.

Heidi's father-in-law allegedly favors her over Lieu due to the fact that she still stays at their mansion.

Alvin's father was allegedly planning to meet Lieu and his grand-daughter during the Lunar New Year. But the plan did not push through as Alvin spent the Lunar New Year with his children in Tokyo.

Despite the impending divorce, the drama between Lieu, Heidi and the Chau family is yet to subside.

TagsAlvin Chau, Sister, Mandy Lieu, public