Now both subjects are send back on the ground again to get screwed as hard as possible. Doing everything for the experiment's benefit Miss Dr. Fox is rolling on the floor with the two cocks in her hands and more than one finger the wet hole. Directly from her body the sperm puddles are collected in the measuring cup while a last sample is delivered by subject Frank himself. In the end Miss. Dr. Fox is more than satisfied with this sensational result of her work...