With the premise that I haven't seen the image either.
Whether she is removing or inserting something it is a kind of strange position from what people are describing. It would be much easier doing it from the chair, considering that the desk is "closed" and nobody would see her. It cannot be an instruction from Aiden because it's again kind of weird and a too little specific.
So the vibrator full speed that catch Sophia off guard forcing her to squat is a reasonable explanation, at least it is the common reaction usually depicted in the... literature

Whether the toy is a good choice or not, that's up for debate (and in case I'm sure it'll make the number of forum pages spike for a while

). But atm it seems a good interpretation for it.
Then, once again, knowing L&P and his teasers he might be very well misleading us once again. (after all they are always teasers, not spoilers

)
I have a couple of questions for those who saw the teaser and are kind enough to answer without violating the code:
- Is there any text that comes with the teaser, beside the title?
- Is she wearing the same skirt as the first teaser? (if visible)