Katherine pushed herself off the couch, breathing heavily. She bent awkwardly as she tried to look back at her ass. "Ohmigod, is she really up there?" she asked, pulling at her cheeks. "That is soooo hot." Alice and Jessica couldn't help but agree. They watched as Katie danced around with the buttplug in her butt, her heavy, fake breasts hanging pendulously from her chest. All she wore was a skimpy tank top and a malicious grin as she hopped from foot to foot. Without warning, Katie reached back and began twirling the toy around in her ass, chuckling as she did so. "Hooooo, shit. Mary feels so good in my ass. She's really turning me on!" Jessica tossed the pink vibrator that was her mother over to Katie and watched as the taller girl fumbled to catch her. "You might as well finish up then." Jessica stared at Katherine lustily. Katie looked at the vibrator with uncertainty. She was certainly turned on, but she never got off while her friends watched. Well, maybe Alice wouldn't, but Jessica sure would. To add a bizarre level to the entire thing, she would be using Jessica's mom to get herself off! But, then again... Katherine sat down on the couch, twitching a moment as the buttplug worked its way against the walls of her ass. She reclined into the leather as she brushed the pink vibrator along the outside of her pussy. A shiver of anticipation spread throughout her body. "You two can't be serious," Alice said. "I can't watch this." She walked into the kitchen, trying to hide that her hands were already beginning to slip into her pants. Katie didn't notice and didn't care. She slid the vibrator into her cunt and allowed the pink folds to close around it. She made an approving noise and switched Jessica's mom on. She fell back further into the couch as her skin tingled with excitement and a mounting orgasm. Jessie watched intently, rubbing her clit through the fabric of her swimsuit bottom. "Ooooooooh, goddamn!" came Katie's moaning, echoing Jessica's, seated across from her. Katherine's ass heaved into the air, and her free hand pushed and pulled at the plug held tight in her ass. The stimulation drove her mad as she rubbed at her clit furiously with the humming vibrator. She discarded it soon, working at her pussy with her fingers while her other hand continued to manipulate her former friend entrenched in her butthole. Jessica saw the glistening vibrator on the table and snatched it up to finish herself off. "Come on, mom," she whispered. "Make me cum, dammit. Make me cum hard." She plunged the toy into her cunt and threw back her head in overwhelming joy. The two friends came nearly simultaneously, their hollering carrying throughout the beach house. Jessica and Katie twitched in their seats, their toys fumbling from their grasps. With a slurping noise, Mary slid out of Katherine's ass while Jessie's mom clattered to the ground next to it. The two toys rested side by side, while Jessie and Katie struggled to regain their breath above them. "Oh, fuck, girl," Katherine said breathlessly. "That was fucking... awesome. What's next?"