Muscle Growth Showoff for Josh

"Hey mom!"

Liz moaned in pleasure. Since she witnessed her own thicc mom grow bigger muscles (and just... more massive overall - biceps, traps, boobs, ass... you name it!) she herself has been holding on to an ever-increasing full-body flex that kept getting more intense as her gardenhose sized veins popped in ever expanding textures all over her outside bursting tricpes as she started to lean on to the house wall.

"W-What sweetheart?" Danielle stuttered in shock.

She was still sweating and breathing heavingly from the sudden growth spurt her 38-year-old body just went through. "Haaah... Mmmmh Aaaah I haven't felt this in a while, I always felt like hiding my BIGGEST secret from you Josh." While bursting out the word 'biggest' without her musclesize increasing tiny veins started to increase with blood all over slighty pronounced legs, chest & shoulder muscles.

Just being back from the gym she still went to on a 2-split basis every week, she had approached the backyard from the south side of their manor. Josh turned around when he wanted to checkout how bad the precum-into-face-situation on his mom really was.

Danielle was standing at the top of the 8-foot incline his son was still leaning against with her soft, semi-erect package having just outgrown her sport tights. It was her favorite sport tight. She had been holdng on to cumming for over 1 1/2 years now because she had been sewing these sport tights her own. When she designed her outfit, she made an voluntary pact with herself to keep herself from growing until she found a husband or... a couple of husbands & wifes actually to join her polyamorous adventures she has been teasing her - of course - one and true husband with over years. As she was finishing her last threads on the huge bagde that said "True Love" wide spread over the front of her pants, sparkled in roses. "I'll keep..." as she put her feet down to activate the sweing machine. "...myself from growing until" she smired. "the right moment..."

With only her first just half-ass tiny growth from absorbing Liz' sprawling juices she had outgrown her self-made tights by a L O T!

After being held off by this tickling sensation of growth she and only her strong & beautiful daughter were granted with due to their strong DNA bond she remembered how she trained herself even 3 more years back to stay super calmed down about her growth powers. Which as wise as she was, she didn't want to run out of hand. Over the years she stared to see signs in her daughter too and knowing the temper of her little Liz, she sure wanted to be prepared for some trouble.

What her proud daughter had in length, Danielle competed in thiccness. Whiel still being about Joshs now painfully 9.1... 9.8 inch stiff member in a 20% erect state her baggy cock was as wide as a 6.5l super limited-edition sized monster energy plastic bottle... that was before she had let her birthday-balloon shaped, very... very soft throbbing dick out of her pants that still said "True Love", now only speard about twice as wide as her now obviously even tighter tights had been stretched over her sagging ass.

"Hey, Liz! Honey! Up here! Eye contact, girl!" She ordered her daughter as Liz kept getting lost in thoughts seeing her own mother's cock.

"Ah, yeah yeah... sure! Mom! Don't you think this is the time to show me what you really got without restraints? All the years we grew up I... I kind figured out about our powers when I was about 16 but was... totally not sure about... yeah this weird whole thing haha." She shortly released her still ongoing tricep flex to point at - well hover really - over her throbbing, fully wet cock as Liz was know backing up a never before amount of cum in ballsacks that felt painful to watch stretching and pressing against her leg muscles.

"It is..." her hand kept encircling, but not touching her long erection in circular patterns. She played a little game in her head where she would just move her hands super close to 'Little Liz' and try to not get touched whenever 'she' decided to throbb in a spontaneous increase in pure horniness. It was harder than she thought.

"Just a really awesome gift you gave me mom". Her dick kept getting hit by her hands, as she was moving her hands more and more away from her cock she... still kept getting hit, as every brink touch of her muscular hands were fueling her girlcock and balls with more lust to fuck.

"So I feel like it is our duty as a family to reach new horizons... try out new stuff! Push ourselfs! I wanna know how to control myself, but I also wanna... hihi... let go and show-off for a while" While she talked she had been slowly creeping up to Josh still lying on the incline having the time of his life.

"Liz," Danielle responded without a single spark of doubt, "I think that sounds like a grand idea."

She jumped down the incline, sitting close to Josh and they both stared up at her third family members angry red cockhead.

"I have to warn you tho, little Lizzy, but I have been backing up on cum in YEARS and my powers are much more trained than yours! I bet I would outgrow you with only my first cock orgasm easily. Would you then still like that, huh?" She admitted to herself that he has been feeling extremely yealous of her own daughter seeing how she was just playfully exploring much bigger sizes than herself - her own mother! She turned competitive.

"Oh, you wanna compare, yeah? Well let's see about that." Liz felt challenged.

Liz playfully moved her hips to the side and struck out her ass away from Josh & his mother. She then raised both arms up so the whole length of her arms was parallel to the ground.

Her mothers cock, which was currently sagging like a waterballoon over the nicely sewn "True Love" and only showing the letters "Tru ve" all of the sudden became hardly erect in seconds. Josh had almost no time to notice how an intense heat was approaching him from his side as his mothers' cock was at its thicc, full mast.

She imitated her own daughter and stretched her arms out wide.

"So the rules are!" OF course her mother would need to bring up something like that. "we both come as hard as we can from our... mmmhh aaaah... intensely backed up containers" pointing her fingers to josh, back to herself, back to josh, back to his sister and all their stiffening balls. "By seeing how much we can cum from just a single-double biceps flex, does that sound good?"

"MMmmmh aaah, YES! NICE IDEA!" Liz screamed suddenly, her eyes being closed for the last minute or two.

Josh's mother and sister both repositioned and kneed next to Josh against the incline, one fully naked, 12 foot tall and horny af, the other wanting to impress.

"Count down with us Josh" They both yelled in anticipation. "But only when you remember measuring our... products after this little growht competition for you".

"3!"
"2!"
"1"

"Flex!"