Vivian was trying to get ready to swim, however she couldn't help but feel a discomfort, so she began to move her hand to her bottom.
Inside the bathing suit, Katie was fighting Vivian's buttocks that threatened to crush her at the slightest effort, though every move she made only sent her deeper, "I had forgotten Vivian had such a fat ass, I have to get out of here before-" before she could finish moaning Katie was pushed deep into Vivian's crack.
"What a treat" Vivian began to scratch hard between her buttocks. Katie was having a losing battle against Vivian's hand as she was jerked and pulled into the depths of the giantess until she saw one of the most intimidating sights she could have for her reduced size plus the putrid smell wafting from it, before her was Vivian's anus.
"GOD NO, PLEASE, EVERYTHING BUT THERE" Katie screamed as she struggled in vain, until she was faced with the gigantic hole that was luckily closed, the hand stopped leaving Katie in shock and letting her admire the scenery, From the folds and beads of sweat dripping down, to the powerful smell and the giant hairs surrounding the crater "Vivian really needs a shave" as Katie was getting ready to move she recognized a voice outside.
"What's the matter Vivian, do you have worms?" Said Olivia who had been spying on Vivian the whole time.
"I don't know, I just felt a bad itch back there, and I think it's still going on" Said Vivian embarrassed that they were watching her scratching her butt.
"I have a trick for that, you just have to spread your buttcheeks apart" Olivia as she chuckled.
Vivian grabbed each buttock with one hand and pulled them apart "Like this?"
Olivia quickly positioned herself behind Vivian and used two fingers to forcefully thrust into the center of her ass.
Before Katie could react to what was happening, she was impacted by the fingers which pushed her hard into her now gaping anus and deep into Vivian's bowels, Katie could only scream as she watched the hole close up leaving her trapped.
Vivian jumped up and down as she watched Olivia laugh out loud, but in return she said "the joke is on you, smell your fingers".
Olivia stopped laughing for a moment to bring her fingers closer, at the first sniff she quickly removed them from her face and began to gag "God that's disgusting, don't you clean yourself".
Now it was Vivian who laughed "that will teach you to leave my ass alone, now if you'll excuse me I have to practice" as Vivian left she put her hand on her abdomen, feeling a strange movement inside her.
Olivia watched Vivian walk away as she focused more on her fat ass, and turned to sniff at her fingers, wrinkling her nose she said "Welcome to Vivian's ass population Katie" and began to laugh.