Amanda got up off the weight bench and flexed her massive physique, giggling with delight as her muscles bulged effortlessly. "Looks like that little protein shake of yours made me even stronger Randy!" Amanda remarked, as Randy nodded, completely in awe at Amanda's incredible body. Flexing her bicep she kissed the massive peak. Suddenly she heard loud moaning upstairs and what sounded like laughter. Suddenly Amanda's eyes grew wide. "Oh no! Jess! Her and Brad have been upstairs fucking this whole time!" Sprinting upstairs, Amanda rushed to Brad’s room with Randy close behind. Throwing open the door they both gasped. They stood at the foot of Brad's bed. Brad was laying naked on the bed, his body firmly imprinted into the mattress, and straddling his waist, her huge three foot wide back to them, was Jess, still pumping Brads cock, even as he lay there barely conscious. her huge thighs held him tightly as her hungry pussy pumped his dick for more power. Her rock hard abs tensed and flexed and her giant beach ball tits jiggled as she rode him. He had came multiple times now and his cum had transformed Jess into the biggest most muscular person on earth. Jess loved the feeling of power flowing through her, her muscles swelling and growing by the minute. She pounded his pelvis harder, feeling a climax mounting, flexing every muscle in her body she screamed with pleasure, arching her back, her blonde mane cascading down to just above her sculpted ass. “OHHHH YEESSSSS! POOOWWWEERRR!” Jess roared as her body shook with orgasmic bliss. Snapping out of her trance she looked down at Brad and laughed. “Looks like you’ve had enough little man. We’ll play more later.” Releasing him from her grip, she rolled off him and stood up. Amanda and Randy quaked in fear as Jess’s huge 7ft frame cast a shadow over them. Sensing their presence, Jess turned to face them. “Enjoying the show?” she purred. Flaring out her monstrous lats she narrowed her eyes at Amanda. “Now what was this about a gun?”