Poking very sensitive bits of Emily with a sharp tool, then noting her reactions.
Turning Nina’s front red using horsehair.
Using some stingy rubber to redden Nina’s front.
Spanking Nina's cunt along with a directive to watch it happening in a monitor, followed by further impact play.
Hitting Nina with a jump bat, and creating some good conflict with a poky-zappy thing and a bit of cunt spanking.
Warming up Kel for the belt with… a belt.
Whipping up and down Nina’s front, with their active cooperation.