Her ex-husband is Hong Kong actor and three-time TV drama winner, Roger Kwok.

Coincidentally, one of the lyrics of "There Are Many Problems Every Day" 《問題天天都多》「There Are Many Problems Every Day BILI BALA BILI BALA」also became the theme song of her then-husband Roger Kwok in Inbound Troubles, the golden words in the drama.

The two met while filming a travel special for TVB in 1999 and had been dating for 7 years before marriage.

In 2017, Cindy Au who had not appeared in TV or movies for a long time, was a guest on the new ViuTV program "Super Dad" 《超級奶爸》hosted by Kay Ho Kee Yau.

She also signed managerial contract under Lorraine Chan (Leo Ku's wife) where she will be more actively do filming related to nutritionist.

[14] On May 2, 2024, Cindy Au announced her divorce from Roger Kwok on social media, ending their 18-year marriage.