A hand slipped over the tranny's member,  slowly pumping the shaft while her thumb softly rubbed the tip.  Massaging the sticky precum into the flesh.  She picked up her pace, ever so slightly her hips rolling fluidly as she moved her false cock in and out.  Occassionally a free hand would tug on one Sophia's nipple clamps,  while her own breasts rubbed against the woman's skin.