A futanari mad scientist, Serene Siren, leads her submissive new test subject, Leana Lovings, into a laboratory. Serene’s hypothesis is that continuous sexual stimulation, mixed with just the right amount of futa cum, can trigger spontaneous appendage growth… in other words, if this works, it will cause Leana to undergo a futanari transformation. Serene positions Leana on the saddle of a sex machine, pulling aside Leana’s panties so the machine’s dildo can enter her. As the machine’s vibrations intensify, Leana’s pussy gets wetter and wetter… and her nipples even start lactating!
