Pathokinesis is the ability to alter someone's emotions through a simple touch. This power is mostly known to be associated with faes. The influence this power plays is only active while the user is touching another person.
As explained by Holiday in Born At Midnight, only a powerful supernatural can tell when their emotions are being altered through pathokinesis. That is why Holiday is completely and utterly amazed that Kylie can tell when her emotions are being altered.