Honestly, his first thought is jerking off. That thought is bolstered by the way that Robby practically rockets from the desk chair once he notices Jack’s presence. Jack presses his lips together tight so that he doesn’t start snickering, but as he looks past Robby at the newly-uncovered screen, he sees—

It’s a video call.

What’s more, he recognizes the face on that screen.

Robby is video-calling his therapist.

Jerking off would make more sense.
别逗我笑了好地狱……