Emma has hired a life model so she can work on a drawing of the male anatomy. But during their session his penis starts to grow and is soon fully erect and bouncing up and down in front of her. Emma seems to enjoy this though and tells him to keep his penis hard so she can draw it like that. She tells him to wank to keep it at full size as she tells him how big his dick is. Emma can't keep her eyes off his throbbing cock and watches with wide-eyed excitement as he loses control and spunks all over the floor in front of her!