Sorry that I'm late. But anyway, no. They never kissed.
In an episode only released through iTunes, Zune, and other sources, an EVO named Scarecrow infiltrated the dam of our heroes. His power was shapeshifting. (Remember him being talked about in Rabble?)
Anyway, his main goal was to put a huge strain on the team and to do this to Holiday, he turned into Six and kissed her. It was Scarecrow. Not Six.
