A plan succeeds...

"Whooo!!!" Karen stumbles out first, holding her shoes in one hand and purse in the other. "Wainwright sistersssssss!" Holy fuck, Karen is hammered. You rush to put an arm around her.
"Oh man, what a fun night." Jenna exits right behind, a trifle more stable, but still glassy eyed and smiling ear to ear.
"Hey baby!!" She plants a wet kiss on you, and grabs your dick. "Let's pour this crazy bitch into bed, then we've got some... talking to do..."
It worked, you guess. Zoe is paying the driver out of Jenna's purse. From the look on the 22 year old's face, he got quite a show. He nods at you.
"Lucky fuck." he mutters as he drives away.
Once you get inside, and upstairs, Jenna guides her sister to the guest room.
"Oh my God, James." Zoe grips your arm. "What a night! It worked like a charm! A couple of drinks and a couple of horny guys dancing with her, and she was very suggestible." Zoe tugs on your waistband. "I was fingering them both on the way back! Karen's a fucking freak, too!!" Her hand reaches in to grip your cock.
"She was hesitant at first, but I brought her around. Head to bed. I need to grab some stuff from downstairs." And she trots off, nearly taking a tumble down the stairs.
No turning back now. You head to bed, stripping down to your boxer-briefs. Jenna comes in via the bathroom door.
"sstoo bad that thing isn't fixed yet." She kicks off her shoes and catskins her dress over her head. You stare in love and desire at her sweat beaded body. "So..."
"So."
"Zoe and I were talking..." she climbs onto the bed to lay next to you, flat on her stomach. You admire the mound of her ass contained only by a lacy pair of boyshorts. She runs her hand along your cock...
"And I know that you know what it was about..."
"I...I do." She smiles.
"Don't sound so nervous, James. I'mm.... I'm ex-shite-d....he he he...im excited." She leans in to kiss you. "I didn't know that you were.... a freak like me."
"All you ever had to do was ask, baby. You know I'd never judge." She climbs on top of you, kissing you sloppily and passionately as she grinds on your cock.
"Hey! You two! Are you starting this party without me?"
You both look at the doorway, and your jaw drops. Zoe has a veritable backpack full of equipment, and is dressed in a tight t-shirt and pink thong. She pulls out the following: lube, two dildos, a vibrator, two buttplugs of different sizes, and of course, the piece de resistance: a 7.5 inch black rubber strap on. Jenna coos at the sight of it.
"Are you ready for this, baby?" Jenna looks at you with love.
"I think so." your mouth is dry. "You're sure this is cool?"
"Cool?....no, it's the opposite of cool, James." She flips onto her side. "How do you want to start?"
"Whatever you want, Jenna." You love her so much right now.
She responds by rolling your boxers down, freeing your cock. It's so fucking hard right now. You fear you might have the opposite problem from normal. You might cum like a 15 year old getting his first handjob.
She slowly starts loving your cock, with languid licks up and down the shaft and swirling around the head with her tongue. Her semi-drunken state does nothing to detract from her skills. She slobbers obscenely on your cock and slowly takes it all the way down, gagging as the girth stretches her throat.
"Gggggggggg....." she gargles, and warm spit runs down your shaft.
"Ahhh....fuck baby...." You are watching Zoe as she slowly straps on the stand-in dick, and peels off her shirt to free her big titties. She climbs on the bed, and begins to eat Jenna's pussy and asshole.
"Ernnnnn!!!!" Jenna moans on your dick, before popping free and stroking it. "Oh my....my fucking god, Zoe...your tongue....Baby she's eating my ass and it feels a-MAZ-ing..." Zoe spits on Jenna's pucker, and works two finger inside, making Jenna cry out.
"Ah!! Oh go slow, girl.... it's been a while..." she slurps on your balls, continuing her luxuriant pace on your shaft with her hand. You run a hand through her hair.
"I love you so much."
"I fucking love you too, baby."
"And I love you both!!" Zoe's spritely voice makes you both chuckle, which quickly fades back to moaning for Jenna as Zoe lubes up the smaller buttplug and works it in.
"OOOOooowwww......" her face tightens up in pain at the intrusion to her tight asshole.
"Relax, girl." Jenna shifts to lying in between your legs, and occupies herself by bobbing rhythmically on your cock.
Your conscious mind goes. All is pleasure right now. Thought is distant.
When thought returns, it's because Jenna is now squealing as she strokes your cock. Zoe is pounding her pussy with the strapon, and by the sight of the smaller buttplug on the bed, and the absence of its larger version, you can guess at the reason for Jenna's incoherent babbling.
"fuckinjesuschristoomigodomigodmigooooodddd......" her wail extends and deepens, like a cat in heat. It's the most erotic thing you've ever heard.