When Serena woke up still thinking Kay was in the building, Kay instantly walked over, albeit carefully whilst her body still was regaining it's full strength. "I'm okay Serena, they got me out" she said, deciding maybe making herself seen by Serena was the best course of action. Josh let Kay and John both reassure Serena that she was okay before looking back at her and smiling softly, "you're back alive...that's the main thing" he replied to her. 

Fia then stepped up after they all had their moments, "we made it out thanks to you Serena, dad got mum back just in time and it seems you unlocked your full powers or something which also affected Drake's I think" she explained.