Myolie Wu and Wong Hei played brother and sister in Net Deception, and they were a couple in Doomed to Oblivion
Myolie Wu and Raymond Lam played brother and sister in Golden Faith, and they were a couple in Survivior's Law
Jessica Husan and Roger Kwok played brother and sister in Rural Hero, and they were a couple in Square Pegs
Gigi Lai and Moses Chan plays brother and sister in Powder and Rouge (The Charm Beneath) and they are a couple in Riches and Stitches.
Flora Chan and Willam So played brother and sister in Healing Hands, and they were a couple in A Case of Misadventure
Ursula Wong Yue Sze and Edward Mok played brother and sister in Summer Heat, and they were a couple in Eternal Happiness