Liam's cock is unlike any you have seen, it's green and bulbous, with thick veins running along it's length slowly pulsing with arousal. He explains that it is a hybrid between a human's and a frog. The lack of a penis on some species would make the conversion process difficult, so hybridization was the solution.
Mesmerized by the pheromones coming from Liam's penis you offer no resistance as he gently turns you around and you obediently place you hands on the wall to brace yourself. Wasting no time you gasp as your vagina parts and Liam plunges into you, thrusting away in a frenzy.
As your ass claps with every thrust made by Liam you drool in ectasy as you begin to change. You watch as your fingers become webbed and elongate, your fingernails falling out as your fingertips bulge, a strange feeling in your feet tells you they have changed to match.
Next your ass and thighs balloon out, your legs becoming thick and powerful. Your now huge rear only increasing the intensity of Liam's thrusting as your jiggling cheeks spur him on. Your skin is beginning to turn a bright shade of green and you can feel yourself becoming slimier by the second as your juices mix with your skin's new slimy coating.
Your arms twist and reshape as they change to match your new legs and you fall forward onto all fours as Liam continues to plow you. Your torso now begins to bloat and reshape, your once slim form expanding into a distinctly amphibian shape. You moan as your breasts heave and expand, quadrupling in size until they resemble two huge watermelons, each tipped with a dark nipple.
You start to scream as you feel your eyes drift apart and expand and your head reshapes into a frog's. But your scream quickly turns into a drawn out croak as your vocal cords change and your now huge tongue hangs out of your mouth. You can only moan as you continously cum, laying in a puddle of your own juices as Liam fucks you.
Your change completes as your vagina and asshole merge together around Liam's throbbing cock to form a frog's cloaca, your once pink flesh now a dark green. You are now a huge frog hybrid, more amphibian than human, but still with some feminine curves and your huge breasts to give away your previous identity.
However, as you continue to cum you quickly realize this isn't over as your stomach rapidly expands, bloating with thousands of eggs. Upon reaching the size of a beachball, Liam rolls you over onto your back and with a final thrust begins to cum thick ropes of hybrid cum into your womb, your cloaca undulates and greedily milks every last drop from him before he pulls back, his penis rapidly returning to human.
Your vision flashes white with pleasure as your cloaca begins to pulsate and your eggs begin to ooze out of your gaping hole, barely concious it will be hours before you come to your senses and take in what has become of you. Liam leaves, the door closing behind him, his job done for today, and you now nothing but a fat frog.