Sammi Cheng (鄭秀文) is a filial daughter and accompanied her mother to watch television on that night. She also wore face mask and clean clothes as a safety precaution.

Subsequently, Sammi posted an online message: “I watch any shows as long as my mother is happy, as it is not within my control 😂  #listen to my elder sister’s instruction to wear face mask and clean clothes at my mother’s house”

Source: https://ol.mingpao.com/ldy/showbiz/latest/20210104/1609730852692/%e5%81%9a%e8%b6%b3%e9%98%b2%e7%96%ab-%e9%84%ad%e7%a7%80%e6%96%87%e6%8f%9b%e4%b9%be%e6%b7%a8%e7%9d%a1%e8%a1%a3%e9%99%aa%e5%aa%bd%e5%aa%bd%e7%9d%87%e9%9b%bb%e8%a6%96-%e5%ae%b6%e5%a7%90%e5%90%a9%e5%92%90%e4%b8%80%e5%ae%9a%e8%a6%81