If Kyle sees them together he's going to think that they're married by how often and the familiarity in which they touch. When David flops over Carter laughs and let's himself get dragged down with him, laughing.

"You really are good."

When he mentions being in a plane crash Carter raises an eyebrow, "Oh shit. That's scary, okay yeah I understand why you might not want to go on any big rides then. But what about walk through ones? I saw that they have a haunted house that looks pretty silly."