Kevin started slow. His thrusts penetrated deep into Alicia's pussy. She was practically sopping wet. The thick young man lowered himself down and grabbed Alicia by the hips. He began lifting her up as he pounded into her, increasing in speed. Alicia whimpered as she felt herself penetrated repeatedly by Kevin's large penis. She looked down, still trying to get used to the fat version of Kevin. He was already losing breath, large meaty hands eagerly gripping at Alicia's fit hips. The young woman arched her back and gripped the fabric on the couch, her own breath hastening with sultry moans.
As their bodies worked against each other, something else had started to happen. Kevin's body was shifting once more. However, it appeared to be a lesser degree. He was still fat, and his body appeared to be adding some more weight, but it was coming as more less toned - not that it was before - and less youthful. Kevin's beer belly pushed out further and folded more over his waist. He couldn't tell, but his balls drooped lower in his sack, and his dark pubic hair grew thicker around his shaft, thighs, and ass.
Alicia was lost in her own please to notice. Her eyes fluttered in and out of serene delight, feeling another orgasm start to build in the dull heat in between her legs. As the years seemed to rush by, Kevin's physique underwent a noticeable change. His once youthfully rounded cheeks gained more definition, with his jawline becoming more pronounced. His body expanded in size, with his arms and chest growing broader, displaying newfound strength and maturity. Layers of soft flesh transformed into a more substantial frame, showcasing his growth and evolution. As Kevin's body matured, his once smooth skin gave way to a new level of masculinity. Dark tufts of hair began to sprout on his chest and abdomen, creating a tantalizing contrast against his smooth, bare skin. The hair on Kevin's head even started to thin ever so slightly.
"Fuck! Kevin! Kevin! Ohhhhh" Alicia started to moan, feeling another wave of pleasure wash over her.
"Fuck you're so tight," Kevin grunted, sounding almost out of breath. His balls contracted against his body, preparing to pump their seed into the fit young woman.
"fuuuuuck!" came interchanging moans as the two partners came within moments of each other. Alicia's tight pussy contracted on the thick penis, eager to milk as much cum out.
Kevin collapsed backwards on the couch, panting with exertion. He wasn't used to his body giving up so quickly with just a short spell of physical exertion. Alicia slowly gained further recognition of her lover, and immediately spotted more changes.
"Kevin.....I think you changed again...." Sitting across from her on the couch was a chubby, 30 year old man. Fat, hairy thighs spread apart, showing his drooping thick penis, resting on large balls. A large beer belly folded over his waist, with an impressive set of moobs, and thick arms.