Kate Tsui played a music diva who had a swimming pool kiss scene with her song writer Raymond Lam Fung in the film Baby Blues.
According to an article in hktopten, she said that it was not awkward because they were both very familiar with each other.
When asked if she was afraid of her co-star Karena Ng being jealous as Kate was kissing her boyfriend, she said playfully: "Sorry!"
But she also added that rumours that Karena Ng had supervised their kissing scene was not true, as Karena was also in the scene.
When Kate Tsui shot this kiss scene, Raymond Lam and Karena Ng had not publicised their romance yet.
However, as they both had the same manager, she had known of their romance earlier on.