It seems motherhood really agrees with Cathy Tsui Chi-kei (pictured). The former model is pregnant with Henderson Land heir Martin Lee Ka-shing's second child. Despite being in her sixth month, she still arrived at Audi's showroom on Thursday for a cocktail party and presentation of a cheque from cosmetics brand Cle de Peu Beaute to the Chi Heng Foundation, for which she has been an ambassador. The charity, founded by humanitarian Chung To (right), supports children affected by Aids on the mainland. 'Being a mother myself, it breaks my heart to see children stranded all alone in the world because of this deadly disease,' Tsui said of why she became involved with Chi Heng. Naturally, the tabloid press was more interested in bombarding her with blunt and often invasive questions about the pregnancy, but the young mother remained composed and calm. 'Becoming a mother has really changed me. It's helped me see what is most important in life. I'd love to have more kids, maybe four in total, but not more than that. It would just be way too much to handle,' she said. That would seem to contradict previous comments by father-in-law Lee Shau-kee (possibly joking) about wanting at least double that number of grandchildren. Anyway, the cosmetic label's HK$300,000 donation will fund tuition fees for 500 children for a year. 'That's the most important thing we can offer these children: an education,' Chung said.