[He has no idea she has any issues about Kitty - he hasn't actually grasped that she works with Reid yet - though he does note the very slight tension in her hand when he mentions Kitty and resolves not to do so again. This is too much fun to want to spoil it in any way!
He grins, and turns her in a tight spin.]
Oh, they're formidable all right!
[Though possibly not quite formidable enough to get Garcia into a shoulder sit. She's got a few pounds on Kitty, unfortunately.]