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Chapter 8: Bigger 

Working on the laptop in his room, still during his absence, Leon is called by Hannah, who appears on the screen dressed very seductively, showing all her big muscles. She tells him exactly what to do and Leon is going to obey...

Back in the parental home, Hannah and Hailey confess to each other that, against their agreement, they have horsed around some with Leon at a distance. They promise each other to hold off for now, until he returns. The scene continues with the big musclegirls messing around with little Frankie. But there is a peeping tom watching, and Hailey is going to confront him...

It's then finally time to return home. Picking his son up at the airport, his dad tells him that the girls have grown a lot, and that he is in for a surprise... Then Leon arrives home, and sees his sisters' new shape. He is blown away, as will you be, dear reader...

This chapter contains lifting, throwing, intimidation, incredible comparisons, flexing, worshipping, scissoring, a superhot online session, and so much more...


Muscles in the Family is a long female muscle growth series that tells the story of two girls who want to get bigger for one boy. Hannah and Hailey, starting out at thirteen and twelve years old respectively, have a crush on Leon. Leon is from a different mom and dad, but they have been living together ever since Hannah and Hailey's mom got together with Leon's dad. For all practical purposes, they're siblings.

134 pages

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No characters are nude or participate in adult action when they are minors.

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5 (13 reviews)
J**a
2023-03-15
A bit of slow burn, but very nice
M*****l
2021-08-25
Impresive caracters
E********n
2021-08-22
This is definitely my favourite series now! I love how big Hannah and Hailey have grown, and I love even more how they love using their new size on their surroundings. Nobody is going to be safe from their gorgeous bodies and fantastically strong muscles, nobody! Can't want to see what they'll do with Leon now and how they'll share him. Also, can't wait to see Frankie compared to these two goddesses! A-ma-zing job on this series, James!
F***k
2021-08-19
One of the best waiting for chapter 9.
K****a
2021-12-29
My favorite chapter so far!, the sisters are HUGE!
A****n
2021-08-24
Love this collection! So far my favorite. Chapter 8 is great as always and it looks like the big thing comes out with the next chapter. So it keeps me very exited and I'm looking forward to the final.
M****l
2021-08-21
Great chapter for that story. Fantastic art work to develop those outstanding physiques. I noticed with pleasure the reference to Katie's character. I enjoyed this story and I hope that Leon Will react to protect himself from being abused. Thank you Mr. Stilton for this story.
m****t
2021-08-27
looks like the brother has now turned into a midget?
e**s
2021-08-24
one of the sexiest stories ever !! and believe me i read them all !! cant wait to next one , im hoping they'll continue to show of with dad :)
R*****d
2021-08-21
I really like this series. I especially like Hailey because she just seems so smart and cool even though she does have a mean streak for her boy toy Freddy. On the other hand he wouldn't go to see her if he didn't like her or her treatment of him.
M**k
2021-08-27
I love the story themes and of course the art is awesome. The pool scenes are very erotic and the characters are just as I would have expected. It would be fun to put the men in playpens and high chairs just to make the humiliation a bit heightened. I love the work and can never get enough. I am hooked!!
D****n
2021-08-23
Superb series! I love the time and attention dedicated to developing the characters... and developing the physiques! Cannot wait for the next chapter and hopefully for more series like this. Awesome job :)
G**a
2021-08-21
This comic is oozing with sexy and control. I love it. The amount of muscle built and the amount of growth is amazing. I cannot wait for the next one to see what happens as well as I cannot wait to see how much bigger they get. I know they just had a huge growth spurt but that is the part I like the most. More please. I can't wait.
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Muscles in the Family - chapter 8

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