Add Keyphrase: 'Fingering her Pussy'

I'm stuck on how she's not really 'masturbating' so far as I can tell. Maybe if I try something a little more explicit?

I write in the phrase 'Fingering her Pussy.'

The camera rotates down until it's facing the wall, and Miss Penrose also shifts until it's not-quite facing her directly. Then her chair disappears, her laptop is shifted to the side, and she seems to start sliding up onto her desk. Her heart-locket becomes wireframe, and a star-shaped earring dangle from her visible ear.

Most importantly: One of her hands is reaching between her legs. Progress! Slightly. I mean, she's more 'about to masturbate' than actively doing so but... I'll take the win.

How should I capitalize?

(teacher, muscular, dark hair, long hair, sports bikini, fingering her pussy, masturbating, glasses, elf brooch, keyboard, desk)