Amazon Scenario

medical treatment is developed that get people into peak physical health
usually provides a 10-20% boost in height too
but in can only be applied at peak of puberty, requires tests to time it right
anon has always been small and weak
picked on by stepsister for being smaller than even her
anon can't wait until treatment makes him healthy and taller
unfortunately stepsister gets it first
in a few months shes even taller and thiccer now
she can easily pick him up and teases him constantly
he gets ashamed that just her presence makes him horny and she knows it
shes always coming out of the shower wearing only her old towels which don't cover her well
she will bump into him hard in the hallway to knock him down and step over him on the floor
she'll pretend to not see him sitting on the couch so she can sit on him and smother him
hes even more desperate to get the treatment
doc has bad news
he's probably already peaked
his development was so weak it didn't get noticed
needs to do treatment immediately
anon doesn't grow at all, except for his dick
he also feels healthier but is really down
stepsister doubles down on the teasing
now he can't even hide his huge cock so she knows when her teasing is most effective
but one of her friends who thought he was cute feels bad for him
takes him aside and gives him a pity blowjob one afternoon
she can't get over how great she feels afterwards
just like the treatment
next day her bra doesn't fit so well
actually none of her new clothes fit quite right and she gets suspicious
gets herself checked out by doctor and she's definitely taller, and heavier but not in a bad way
doc is like sometimes treatment has rebound effect, blah blah blah, nothing to worry about
she suspects anon is the real cause
comes around when hes home alone
anon has a fun afternoon with the amazon
she gets a second dose of the effects
they figure him getting the treatment at the wrong time did something weird
but they don't ask too many questions as they have nothing but fucking on their minds
she gets him to come over to her place for weeks after as the rebound keeps bounding
tops out as a completely stacked hottie by end of summer
towers over anon with tits bigger than her head
thighs thicker than his waist
becomes anons gf even after the growth stops
fucking him is like an aphrodisiac all on its own
her friends, including anons stepsister, ask her how she got even bigger
and are even more curious why shes with a shrimp like anon
eventually one of them puts two and two together
confronts her about anon being the reason for her rebound
gf is terrible liar, jig is up
friend asks to share
gf won't allow her to have sex with her bf
friend says it's too bad blow jobs don't work
gf turns out to be more open to sharing anon that way for her own reasons
invites him over with friend present
anon gets a blowie, gf gets turned on watching her friend worship her bf's cock
as soon as friend is out of the room she jumps on him again
anon is getting a blow job and ravaged by gf twice a week now
other girls start finding out
anon is getting daily cock worshiping and endless amounts of sex with gf
takes the weekends off just to be with gf and recuperate
meanwhile step sister can't help but notice his rise in popularity
as well as the rising height of all the other girls
none of them get as big as anons gf from just the blow jobs but they are happy with what they get
teasing anon doesn't seem to phase him anymore
none of the girls will tell her anything
they laugh in her face when she asks them how they are triggering rebounds of the treatment
finally notices when a girl is starting to rebound and follows her after school out of desperation
thinks she'll corner her and can demand to know what they are all doing
instead finds the girl driving to her friends place instead of to her own home
confused the stepsister waits around
decides to confront them both when they leave
shocked to see the girl, her friend, and anon leaving the house together
suddenly clicks why everyone thought it was so funny she didn't know
confronts anon next chance she gets
he refuses to tell her anything even after she begs
anon jokes about it with gf and how he won't help his stepsister out
this gets gf hotter than ever
gf demands to watch his stepsister beg and debase herself for anons cock
anon and gf tells step sister how she can get the "treatment" as a pair
at first she refuses
but anon's gf pulls out his big cock
as she plays with it she starts talking about how soon all the other girls in school are going to get a rebound
all the boys will have amazons to choose from and stepsister will have nobody give her a second glance
anons pulsing rod is wet with pre and something about the aroma filling the room tantalizes her
they make her beg in the most pitiful ways for the opportunity to suck his dick
eventually she gets to and despite her resentment, or maybe because of it, she loves it even more
anon blows one of his biggest loads ever in her mouth
she barely gets it all down without choking and hates how good it tastes
they keep the routine going for weeks and anon and gf have fun making new demands before she gets her fill
stepsister doesn't even really enjoy the growing but now she can't help but long for anons cock
even after the growth is over she finds herself begging for more
the other girls eventually got over it, but she has to live with him
anon starts to think she enjoys all the debasement
shes so big and strong now he couldn't really stop her, but still she plays along with his every demand
anon makes her wear maid outfits when their parents are not around
she even starts masturbating during their sessions, with anons permission
anons gf joins in whenever she can
stepsister has to serve him and his cock before getting her fill
massages, footjobs, and titjobs are his for the taking
she even becomes somewhat nice to him outside of their play sessions
meanwhile anon and gf are already making plans to bring his "pet" along with them to college