The transformation began at Gina's feet, which turned from dainty lady's feet into huge size 11 pontoon boat feet. The soft flesh of her calf grew taut as muscles emerged from hiding to become powerful and well-defined. Her legs were growing in length as well as her knees grew hard and callused. Her hips narrowed as her thighs turned into twin columns of power. The soft, pillowy butt she had always hated melted away as she acquired hard, rocky glutes. Finally, black, wiry hairs sprouted from her legs.
"Yum" said Kelly, her eyes focused on Gina's lower body, avoiding her icky still-female upper half.
Gina looked at Kelly's huge penis with mingled delight and fear. "Are you going to fuck me with that?" she asked.
"I sure am, boyfriend" answered Kelly. "But first, I wish that as I fuck Gina in that cute little ass we both continue to masculinize, and at the moment I come we both be completely male."