While Nick Cheung Ka Fai and Nicholas Tse Ting Fung were working on THE STOOL PIGEON (SIN YUN), Cheung Ka Fai saw Tse Ting Fung had his second son and was very envious. He joked that he had to ask Tse for the secret to have a son. Cheung Ka Fai confirmed the story but joked, "Asking him was useless. He answered, 'I have no trick, Heaven gave (the children) to me!'" He even confirmed that his wife Esther Kwan Wing Ho had two miscarriages. Although he longed for a son to continue the lineage, either way he could just let it take its natural course.
As for rumors that Ka Fai visited "fertility expert" Dr. Ho Wing Chiu and invested HK$200,000 on in vitro fertilization, Cheung Ka Fai responded, "That's false." Despite not having a son yet, Cheung Ka Fai and Kwan Wing Ho remained very loving. Speaking of the secret to his marriage, he answered sentimentally, "That's destined!"
Cecilia Cheung Pak Chi frequently exposed Lucas to the limelight and permitted him to provide his voice to Stephen Chow Sing Chi's new film CJ7 THE CARTOON. The outside questioned her intention of treating her son like a "money tree". Ka Fai said, "I don't like exposure for my
daughter. It would be the best if she has no contact with show business, but I don't understand; is it considered high profile when a mother takes her son outside and is caught on camera? Children have the basic right to 'live' too, you can't deny his 'existing' rights because his parents are artists......whether (Cheung Pak Chi) was high profile or not it's very hard to say, as for treating her son like a 'money tree'? I don't know......"