The scene begins with Madison talking dirty about how much she misses you and how you need to come back and please her.
She starts by playing with her tits and covering them in lotion before bending over and fingering her ass. Next she gets out a dildo and starts giving it a blowjob before bending over in her chair and fucking herself with it. She then sits back in her chair and fucks herself with the dildo before finally giving the dildo another brief blowjob and bouncing her tits for the camera.
While all the above is going on Madison is giving light masturbation instruction / encouragement.