Her hand seemed to be possessed! After she had slowed down, it began to speed up, seemingly of it's own accord. The things it was doing to her pussy had her squirming and moaning in her office chair.
Since she was alone in the lab and had no pillow, there was nothing to muffle the sounds Jean made. She cried out when her clitoris was rubbed, soon taking over control to rub the bundle of nerves just how she liked it.
Her fingers were an abnormal blur as she rubbed herself, until she jerked her hips up and clung to the arms of the chair with her free arm. Her legs were stiff as steel as the knot of tension in her belly unwound, the redhead crying out as her juices spread over her fingers and soaked her panties. When it was over she collapsed into the chair, barely managing to keep from sliding out of it as she gasped for breath.