Chapter 4: Girls and their boys 

Little girls grow big. Hannah and Hailey have both reached the age of eighteen in this chapter and you know what that means. Yes, that! And also: that they’re a lot bigger than before (even though they will get a lot bigger still).

Biding their time to get their hands on Leon, each of the sisters finds their own boy to play with. Hannah’s is the bodybuilder Jago, who is bigger than Hannah (for now), but shorter. Hannah teases him for it and challenges him. They are both in for a surprise.

Hailey’s boy is her very small schoolmate Frankie, who does schoolwork for her in return for… proximity to Haileys gorgeously hot body. In this chapter we see how Hailey mandhandles the little boy in a sublime way, overpowering and dominating him with incredible ease and cockiness.

As the young female bodybuilders grow, so grows their confidence. Hannah gets closer to Leon (and you can take that quite literally), and when Leon brings a female friend home, Hailey makes them clear that she’s none too happy.

This chapter features comparisons, wrestling, intimidation and domination, lifting, the first NSFW scenes with both girls, boob- and muscle worship, a beautiful throw, and 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.