The couple next door were young, but looked like newlyweds. The guys already had his underwear back on and the girl looked unsatisfied. Tom was so horny that he decided to get freakier -- they would wake up normal and think it was only a dream anyway.
The two were laying in bed, still awake when they felt something on their backs. Tom had slithered 'worms' of mass into their bodies from the back. The guy felt an urge to pee, got up, but found his dick still hard. He felt warm as he watched in the mirror. His body was bulking up, he looked like a muscle contest winner and his dick thicken and grew to one foot long. His wife's chest also got warm and two large DD breasts pushed her nightgown open. He return to the bed, confused, but found his wife moaning and drooling at his beefy form. He proceeded to screw her, but he found himself so large that he was on the bottom, her on top. She also seemed distant.. then he realized she was being pushed apart from his large pecs as his dick extended and thicken. Her pussy was impaled on a two foot shaft, his balls inflating to the size of bowling balls and pulsating with cum. She screamed and moan, no one heard since tom already coated the room and isolated the sounds. She rode him like a mechanical bull until he tensed and creamed her, the stream of cum pushed her off the end of his cock and he proceeded to cover her in cum. Her breasts surged forward, large, found, and firm. Her tits stopped at beach ball size as his cock grew out and between her large tits. The repeated tity fucks caused his bloated cock to fill her mouth with his oddly tasty fluids.
The guy didn't notice his ball sac laying empty on the bed, his muscles sweaty and heaving from the workout. The girl was in ecstasy, exhausted behind her huge tits.