Creepy office guy is presumed to be following co-workers around to different clubs using a ConnectUs app.
Judy (the blond) suggests the use of a new software (SOFix) that Raffe tried to use to brainwash her to log his keystrokes to get the proof they need to go to HR.
TWIST! Instead the SOFix goes along their email chain and brainwashes the entire group including the guy to obey Judy.
TWISTx2! Judy gets a mysterious message that also brainwashes her.
SOFix has become self-aware and they all pair off with unsuspecting co-workers to play checkers and fantasy football online make the sexy times.
That was my take on it.
Some minor amendments in my mind:
They decide the creep was tracking them by hacking their emails, as Sue wasn't on ConnectUs
Judy
deliberately (frame 3 on page 9) emailed 5 women(the brunette friend she was talking to at the beginning, Nancy, Sue, Mbaxter and Olivia) with an email contaminated with Sofix and and the rogue executable file was downloaded six times (5 girls plus the creep's hack) and installed itself as a Graphics Driver update. Judy probably didn't really believe the software had MC capability when she did so, just covered all the girls whose email accounts the creep was probably hacking.
The original version of the software designated Judy as their mistress but it mutated for one reason or another, OR took Judy over (page 9) and she amended it, to make SoFix master and all the 5 women sex slaves to any man.