Looking at jason you see a teenager of mammoth proportions, with giant muscles and 7 foot in height.
"this is so cool" jason exclaims,
"i know right! you're 7 foot tall!" you respond, amazed at the magical properties of the chronivac.
"can i have a turn?" jason asks,
"of course" you say, moving to let your cousin have access to the computer. Jason steps towards the computer and sits down at the chair, typing on your keyboard. You try to see what he is doing, but can't see over his massive shoulder, then his shoulder moves as he moves the mouse to press the 'done' button. He stands up, while a blue mist starts to gather around your computer, then moving directly into jasons chest, and jason starts to moan. Unaware of what is happening you turn to the computer, but twist back around when you hear jason laugh softly. His chest starts to darken in the centre as a line of hair makes its way towards his stomach, and around his belly button. hair sprouts from his armpits, and his sharp jawline become rough and dark with stubble. Realising whats happening, that jason is aging himself, you try to stop the program, not wanting him to be older than you. spinning around to your desk you feel a massive hand on your arm stop you, jasons massive hand.
"what are you doing?" he asks in a baritone voice which results in an immediate perk up from your penis.
he pushes you onto your bed and sits on you, with one leg on either side of your chest.
"ive made the program of yours do 4 things. First its going to age me up to 25, changing my body to suit. Second, its going to give me all of the powers that the program has, so ill be able to change anything about anybody, including myself, and giving myself powers. third, its going to delete that program off of your computer and any copy of it around the globe, and stop anybody else from reproducing it ever, it will also reverse any effects that any other people used it for, apart from me. and lastly its going to make everyone be used to this change, i will always have been this strong and hot, and this age. and the first thing im going to do is play with you"
all this time his thighs and calves were growing even more, increasing the weight on your chest, and he has still been aging, growing hair, maaturing his body, and growing taller. getting off of you, he turns and locks the door.