After drifting off to sleep in the other room an unconscious Jake is unable to stop what happens to him next as the piece of symbiote that hid away earlier slithers out and begins to multiply growing ever more large with every passing hour till it is large enough to grow out a tendril which it then uses to uncover and completely undress Jake. Jake is helpless to stop it as it begins to encase his body completely and as it is doing this it is also changing Jake's body at a molecular level.
Once his entire body is encompassed all the body hair on Jake's body completely disappears aside from on top his head, including his beard and his bones begin to crack as his body is reshaped. First his stomach and mid section shrinks in giving his torso a hourglass figure as his spine arches foreword as well accentuating his curves even more. Next his hips and ass expand outwards to child bearing proportions and his penis disappears completely being replaced with a vagina. Next his shoulders cave in as he loses a lot of height shrinking from his towering 6 feet to a much more modest 5'4" tall.
A feminine moan escapes her lips as well as her nipples enlarge and balloon out to DD size breasts and her transformation is finished off with her arms and legs becoming smaller and daintier losing all their muscle definition. Once all the changes are complete Jake is forced awake by the symbiote but is unable to control his body anymore and is merely a passenger in his own body as the symbiote then lowers a hand between their legs and begins fingering itself causing both Jake and the symbiote to moan in ecstasy at the same time.
Just then you wake up and hear the loud moan coming from the bedroom and curious to see what is going on you creep the door open only for your heart to skip a beat as you see the female symbiote laying in the bed where jake used to be. Immediately you grab the gun you keep stored in the laundry closet for emergencies and storm into the room aiming the piece at the symbiote you scream "WHO THE HELL ARE YOU AND WHAT HAVE YOU DONE WITH JAKE!?" frightened by your sudden outburst the symbiote looks at you and begins laughing "why, i converted your partner and he is now loving every second of being a she that i can tell she would never want to go back to being a yucky man ever again".
You then fire a shot at the symbiote and it just sits there unfazed as it pushes the bullet out and it falls to the ground. A tendril then launches out and smacks the gun out of your hand. Afraid you turn around to run but don't get too far as her tendrils latch themself around your wrists and ankles and fling you up onto the bed where she then positions herself above you and begins to undress you. You fight with the monster and scream "ill never be in love with you! i love jake! not you!" but then you feel a cold sensation envelop your mouth as she covers it and whispers into your ear "not for long".
and with that she begins to envelop you causing you to undergo the same transformation Jake did, you fight it at first but as you get completely covered your will to keep fighting fades completely as you feel your body shifting you begin to accept your fate. Unable to change it and once the changes are complete you look up at your new partner in this new body and begin to lick your lips with your elongated tong and purr out "what are you waiting for sister? an invitation?" and with that your partner then moans again as a shaft is erected from her groin that you recognize all too well.
You smile as she begins to plow your tight pussy with her new endowment and you both scream and moan in ecstasy as you experience sex as a female symbiote for the first time and any remaining thoughts of being a man are washed away from your mind as you wholeheartedly accept this new reality. But as your partner leans in closer she gives you a big kiss on the lips causing your body's to begin fusing together and your whole body begins to radiate with pleasure as you and your partner are coming together to form one being and you grow to a towering 8 feet tall before you stop growing and lay there fondling yourself for hours.