I didn't know they MADE double-ended strap-on vibrating dildos!

But I was lucky enough to be over visiting Pat and Julie Allen when one arrived, UPS. Julie almost squealed with delight when Pat, with a big grin, pulled it out of its box. "Miranda is SO thoughtful!" It was a gift, or a payment, or a move in some complex female game, from Miranda Brannigan, the lovely petite Chinese-Irish friend of Julie's from Vancouver.

It was a big strange offwhite thing, like two unnaturally large cocks joined at the base, at a shallow angle, with straps and a couple of buttons in the center. The girls passed it back and forth, examining its features gleefully. Julie put one end between her lips and sucked suggestively, looking deeply into her sister's eyes. Then they both burst out laughing, just as the doorbell rang. I went to open it.

"Oh, hi!" said the woman in the hallway, "I'm just returning this to Pat." She tossed a book onto the table beside the door. Then, looking into the room, her eyes lit on the device.

"Ooooohhh! New toy?"

"Yep," said Pat, "interested?"

"I'm not sure if that device is legal in this county, Miss. I may have to confiscate it." Sondra Hernandez, the woman in the hall, is a cop, although in her jeans and her Coors t-shirt, she was obviously off duty.

"Wouldn't you like to help us try it out first?" Julie asked, with a suggestive little thrust of her hips. She was spreading K-Y jelly over the ribbed ends of the toy.

"If that's a bribe, count me in!" Sondra said, and strode into the room. I closed the door after her and followed.

Pat and Julie calmly and beautifully began to undress. Feeling like a little boy in a candy store, I sat watching, trying to be inconspicuous. Pat pulled her sweater off over her head, and reached behind herself to undo her bra. Her full heavy breasts jutted forward marvelously. Julie unbuttoned her shirt and slid out of it; her breasts, small and exquisite, jiggled slightly as she freed them.

Something poked me in the ribs. "You, too!" prodded Sondra, taking off her own t-shirt and bra. Breasts five and six were conical, golden, and altogether luscious. I swallowed hard and started to slip out of my own clothes. I had a bit of trouble getting out of my undershorts; there was something in the way.

Naked and completely unselfconscious, Pat and Julie stood for a moment looking at each other. I sat on the couch, my penis coming quickly to attention, and my skin prickling. Sondra plopped down beside me, her thin muscular haunch up against my hip. Pat looked over at her. "You don't mind if we try it out first?" she asked, "It's only got two ends, I'm afraid."

"No problem," replied Sondra, and she turned to look at me. "I'll be fine." My pulse raced faster; Sondra and I had been lovers just once, in unusual circumstances in a dark alley, and if she was interested in trying it again in slightly more normal conditions, I was all for it. She is a thin but curvy woman, strong and quick, with dirty blonde hair cut close to her head, and hot challenging eyes.

Pat stepped forward and took Julie in her arms. The sisters kissed softly, eyes open, their lovely pink lips meeting gently and delicately, old friends. Then Julie closed her eyes and opened her mouth, and they hugged harder as they kissed, their naked bodies twining together. After a long moment, Pat came up for air. "Have to get the natural lubrication going," she commented, and then thrust her tongue back into Julie's mouth before Julie could reply. Julie moaned and bent one knee, sliding her leg up Pat's, and rubbing her pussy against her sister's body. Pat's hands slid to Julie's lovely ass and pressed the tan globes tighter against her. I heard Sondra sigh beside me, and she ran one hand along my knee. I moved as if to turn toward her, but she squirmed around and I ended up with an arm around her instead, the two of us just sitting and watching the sisters.

Pat pressed Julie down into the armchair and, holding the toy in one hand, gently parted her sister's thighs with the other. Julie put her arms above her head, eyes closed, and rocked her hips forward toward her sister. Her lovely nineteen-year-old body was stretched out on the chair, a picture of receptive lust. Pat bent down and kissed her delicately on the smooth skin of her inner thigh, then again on her labia. She sighed.

Pat's left hand rubbed gently against Julie's vulva, and then opened her, moving the lips apart to allow the oiled head of the dildo to enter her. The head moved slowly into her cunt, and she spread her legs farther apart to accommodate it. When it was in an inch, Pat slid it back out, and then pressed it in again, deeper this time, rubbing the skin by Julie's clit with a finger at the same time. Julie moaned and wriggled on the chair. "Oh, God, Pat, oh God just put it IN!" and she pushed herself forward against the wet plastic. Pat grinned and with a single motion buried the dildo in Julie's body, all the way up to the central curve. With a long "AAAaaaahhh!", Julie shuddered, then relaxed and opened her eyes.

"Oh, very NICE!" she said, drawing the black leather strap around her waist and cinching it up. The other end of the toy stuck out from between her legs. It wasn't quite the right shape for a natural cock, but the sight of it sticking out from between her gorgeous thighs was bizarre. And somehow very sexy.

Julie stood up, carefully, and took a few steps, her breathing not quite steady. Standing in the center of the rug, she put her hands on her hips, thrust forward with the protruding cock, and declared, "Look at me! Today, I am a MAN!" We all laughed.

Then Pat's voice got flat and serious. "Turn it on," she said. Julie's eyes widened. "Turn it on," her older sister repeated, a little louder. Tentatively, Julie moved one hand down to the thing between her legs, just touching the tiny switch. Pat looked her in the eyes and nodded. Julie looked up at the ceiling and turned the switch. Instantly, the dildo began to hum and vibrate, becoming slightly blurry, like the end of an electric toothbrush. Julie moaned deep and low. Her eyes closed. A flush began to creep up her stomach, and she sank slowly to her knees, her mouth open, the hard warm plastic of the toy vibrating maniacally inside her, and thrumming against the tender stiffness of her clit.