The deep, rich musk enveloped Jeff, the room suddenly feeling too small as the overbearing scent swirled around him. His breathing turned harsh and raspy as he sucked in deep gulps of it, almost being able to taste the testosterone in the air. His pants were growing uncomfortably tight and, unbeknownst to him, his pupils had expanded as lust began to fog over his mind.
Mike smirked down at him, his own intellect dulled under the roar of dominance and lust. One massive paw squeezed his cock, thick clear precum oozing down the shaft. His cock was as large as a normal man's forearm, and twice as thick, but his meaty paw still held it tight. Golden eyes glinted as he took a step towards Jeff, causing the teen to let out a moan as a wet spot grew on his pants, the enormous furry cock tangling inches from his lips. His father leaned forward, tracing the tip over his son's lips and leaving a shiny, sticky film. Jeff's tongue darted out to touch it and both groaned; Jeff wantonly at the salty, mind-numbing flavor and Mike in a growl as his other hand raked through his chest, tugging hard on his chest fur.
Any reluctance Mike might've held prior to his transformation was gone; lions were pack creatures and fathered many children with their own kin. Therefore he felt no shame as he wrapped one hand in his son's hair and shoved his cock into the boy's mouth. Jeff gagged as it stretched his lips to their absolute limit but Mike held firm. Not even a quarter of his cock was lodged in his son's throat and already the boy was crying, consuming lust fighting against the urge to breathe.
Mike pulled back slightly so just the head of his cock was in Jeff's mouth, allowing the teen to suck in air around it, before he slammed back in as far as he could go--farther than before, so now half of his cock was jammed in Jeff's airway. His throat bulged obscenely, lips turning white with the strain as he swallowed fruitlessly. The tightening pulled another groan from Mike as he pulled out and thrust in again, forcing his thick precum down his son's throat. He thrust again and again, Jeff going lax as he grew lightheaded, cock still rock-hard in his pants. Finally Mike let out a throaty roar and shoved half his cock (as much as he could fit) down Jeff's throat, cumming like a faucet. It shot unobstructed down Jeff's throat, his son moaning as his belly was filled with his father's seed. Mike shot several loads, so much that it began to mix with the drool leaking out of his son's mouth. After several moments he pulled out, his son collapsing with a groan onto the couch, lips stained with his father's cum. But Mike was far from over.
However, at the same time, the Chronivac was whirring away upstairs, its processor moving from Mike's profile to Jeff's; their biological relation meant that any changes overlayed onto family, especially when it was a change this extreme. It began to launch a near-identical transformation to the boy, albeit with a few important changes...