When Drake said about an ambush but not at the mill House, Kay's blood ran cold metaphorically. She knew exactly what it meant and it was her concern from the moment that John said he was going to go now. "It does to me. John, Chas and Fia went to the key lines point of crossover. It's how the demons and such are finding us, they're using them as a tracker" she told him. She didn't know how he'd take the news of Fia being in danger, but she guessed not well judging by how close they seemed to be. 

Fia and Chas kept watch but saw nothing out of the ordinary. Fia however could feel something was off and it was putting her on edge. "I don't like this Chas..." She stayed, "me neither Kiddo but John knows what he's do-----" he began to reply when he suddenly saw John go flying backwards and into a bench, putting him into defensive mode instantly. He quickly ran to the car and opened the trunk to grab a baseball bat in the hopes it would at least keep whatever it was back. "John!!" Fia shouted, she needed to know if he was still conscious as her eyes darted all round to try and find the attacker, to no avail. 

"Shit!" She cursed, then remembered she knew a spell she could use, "if your gonna play it that way, let's play" she muttered as she started to recite an incantation to give her the sight to see the invisible.