What Are Friends For? [F/F, F/Futa]

Story by Damn_Gurrrrl

:149: Hello, Futanari Palace, this will be my first contribution!

I read this story on a blog a while back, and it quickly became one of my favorites. Big thanks to the author, although I don't actually know who the author is. Here is the original story: http://sizefan.blogspot.com/2008/02/what-are-friends-for.html

I am posting the original to give credit where credit is due,

but I really wanted to improve upon the theme in the story, so I heavily edited, expanded, and hopefully improved this story.:116:

Without spoiling too much, here are some detailed tags for part one: F/F, F/Futa, huge but not ginormous cocks, sister/sister incest, fisting, minor streching, college, and a healthy dose of cum.

Holly was sitting in the back of her 1pm class that day, dozing off. She often daydreamed about sex during her boring classes, and today wasn’t any different. She ground her thighs together as she half-dreamed, half-remembered her very first time.

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“Holly, you know you promised you would do it for me on my 13th birthday. Now get over here,” said Tammy, Holly’s older sister.

“But you tricked me into making that promise, it doesn’t count!” she pouted across their shared bedroom.

“If you don’t put your butt on my lap in 10 seconds, I’m going to tell all your friends that you broke a pinky swear, and they should never trust you again!”

“You Would Not!”

“10, 9, 8, 7”

“This isn’t fair!” Holly threw off her oversized shirt, exposing her 11 year old tits.

“6, 5, 4, 3”

“You better not tell anyone about this,” she said as she stripped her panties off and grudgingly climbed onto her sisters lap.

“I promise I won’t tell anyone, Holly. But you know I really want to see how this feels. I’ve heard it will feel good for both of us,” said Tammy, grabbing her hardening tween girlcock and placing it between her sister’s young pussy lips. Holly remembered the first time was painful as her sister’s young pecker slowly tore her virginity away. Only the widening head would fit inside of Holly. She squealed in pain as her 13 year-old sister held her onto her growing cock by the hips.

“Tammy, its stretching me apart! I want to get off!”

“Wait, I’m almost there. Just hold on!” said Tammy.

And as the girl-dick reached its full length and width, the ping-pong ball sized head inside of Holly erupted with splooges of sticky white cum. Tammy’s eyes widened as she experienced cumming in a girl’s pussy for the first time.

“ooooooooooohhhhhhhh yeah”

“aaaahhh! What’s happening!” whined Holly. She grimaced as a heavy load of white cum shot out of Tammy’s cock directly into her cervix, forcing the tight ring of muscle to open and accept the blasting orgasm. Holly couldn’t believe what was happening. “ooooOOOOooooAAAAHH oh my gosh!” she breathed as a huge amount of girlcum filled her womb, making her spasm into her own orgasm.

As Tammy collapsed onto her back, bringing Holly with her, both lay panting on top of Tammy’s bed, completely overwhelmed by what they had just experienced for the first time.

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If it hadn’t been for this one night as an innocent little sister, Holly would have never discovered her love for huge cock. Even though it hurt, she kept letting her sister stick her expanding cock inside of her vagina, waiting for the orgasm that would send her over the edge as well. She discovered that her cervix and womb were much more sensitive to pleasure than her vagina, and, as her pussy stretched to accommodate more and more of her sister’s cock, she started to squeeze her sister’s dick as she sat on her lap, tonguing each other those evenings on Tammy’s bed.

But Tammy’s cock wasn’t staying the same size, it was growing with Tammy. She had just entered puberty, and so had her libido. Soon Holly was getting fucked by her sister as soon as they woke up every morning for school, and before they went to sleep every night. Tammy’s Breasts and hips were growing, too. Every ten months or so, Holly and Tammy would go to Victoria’s Secret to pick out new panties for both, and new bras for Tammy’s tits. Each time they increased a cup size, until Tammy had perky C cups by the time Holly turned 13.

Holly’s lithe, youthful frame didn’t change much over the years. Her hips got wider as she grew two squeezable buttcheeks, and she grew to five feet three inches, but her titties stayed small A cups. Her nipples got puffy and her pubic mound came into place. She continued to stretch her sex with Tammy’s growing cock. By the time Holly was 15 years old she was able t

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