"Bend over, Katie." Jessica walked towards her friend, her bikini bottom still askew. The little black buttplug was held out in her hand like a threat. "Oh, you can't be serious," Katie whispered as she began to back up. "Yeah, Jess," Alice cut in. "Right here?" "Why not?" Jessica answered. "We're going to have fun here all weekend. We might as well get used to seeing each other naked." "Yeah, naked, maybe, but seeing each other with toys in us?" Jessica shrugged as she started to position Katherine over the couch. She spread her legs wide to allow her mini-skirt to ride up and reveal her red thong once more. "Look, you're either going to have fun with us the weekend," Jessica pulled down Katie's underwear while giving Alice a hard stare, "or we're going to have fun with you." The implication that Jessie would turn Alice into a sex toy or something was enough to catch the youngest girl's breath. She was excited to think about it. "Uh," mumbled Katherine with her body draped over the back of the couch, "are you really, like, gonna put Mary up there?" Jessica was too busy to answer Katie; with the buttplug in her mouth, she twirled it back and forth to coat it in a layer of her saliva. With a soft "Pop!" she pulled the toy out and held her friend's ass in her hands. Katie had a completely bald pussy that remained pert and gorgeous beneath her butthole, which was a tight knot that looked to have never been used. "Pretty tight ass you have for a slut, Katie," Jessica remarked. "I don't put anything up there!" Katherine shouted back, flustered. "Alice," Jessie barked, "help me hold Katie down. If this is her first time..." Alice did as she was told as she placed her hands on the taller girl's shoulders and pressed her into the soft leather of the couch. Katherine began thrashing beneath their grasps. "Okay, enough's enough, guys!" she pleaded. "Like, you can't do this to me!" "Shut up, Katie, you'll love it," Jessie promised as she began to rub the tip of the buttplug around the squirming woman's tight butthole. The slow circling began to relax Katie as she started to enjoy the idea of having Mary up her ass. Jessica attempted a few exploratory pushes against Katie's asshole but to very little progress. "Geez, you really do have a tight ass, Katie." Jessie gave a quick laugh then, before adding, "A tight-ass like Mary should appreciate the irony of this." She gave her former friend another quick lick before she prepared to get down to business proper. Jessica slowly began to push the black toy into Katherine's ass, reveling in her friend's moans. Alice watched with an unwavering stare. She could feel her cunt starting to moisten as Jessica continued to fill Katie's hole. Katherine felt the plug filling her up and the sensation had her grinding her hips up and down. "Woah, slow down there, you dirty... I've barely got the tip in and you're almost ready to push it right out!" Jessica complained. She gave a harder push and watched as the once tight ass started to envelope Mary's slick vinyl form.. "Oh, daaaaaaaaamn..." Katie squirmed and struggled while Alice held her down. She found her face buried into the younger girl's pant leg. Glad she's enjoying herself, Jessica thought. She felt a wetness building in her swimsuit bottom as she continued to work the buttplug up her friend. And I'm willing to bet that Steve is enjoying himself, too. Pushing the thoughts aside, she glanced up to her two friends. Jessica was moaning into Alice's leg, who was staring fixedly at Jessica's ass. Alice chewed at her lip and Jessie could see the desire in her ears. "Last push, Katie!" Jessica shouted up. As she said it, she applied enough pressure behind the toy to let Katie's ass to swallow the rest up to the base. Now, sticking out of her tanned buttocks, a round black base marked Mary's place up Katie's ass.