Kay was glad that she was understanding things correctly, yet it didn't stop it being any less mind blowing that Serena was the daughter of an actual god. But then again, she figured it was just as plausible as it was for her to be a phoenix in human form and mystically bonded to John whilst their daughter from the future is sleeping upstairs. She glanced upward toward the main door at the top of the spiral staircase when she heard it, then back at John, "go get some sleep, I can tell Chas you're sleeping in, I got you" she said, prepared to cover for him so he could get at least a nap in. 

As John suspected, it was indeed Chas arriving after having spent breakfast with his own daughter. "anyone up?!" He called through the house as he closed the front door behind him.