Watching Sis Try Mom's Vibrator

I hid in the shadows of my parent's bedroom, peering into the white light of their large bathroom with its high, granite countertops and glittery fixtures. In the center of the room stood my sister, naked from her sports bra that was pulled up to expose her pointy pink nipples all the way down to her painted toes. She held mom's "massager" up in between her legs, which were awkwardly spread as she stood on the tile floor. Her feet arched upward as she balanced on the toes of her right foot. The soft hum of the rounded end of the massager undulated as she varied the pressure against her quivering skin. Her gentle groans of pleasure echoed softly against the porcelain surfaces of the bathroom. I found the responses of her body mesmerizing.

I could hear the voices of our parents and their friends downstairs playing cards. We left the door to the bedroom open both to heighten the risk of the dare and so we could hear someone coming down the hallway in time to do...I don't know what. We were both bottomless, our matching pubes bristling in the soft light. Hide maybe? It would have been futile, but that was kinda the point of the dare.

As nervous as that should have made me, it was my sister's pleasure and the anticipation of her orgasm that I was most focused on at the moment. I'd never seen her cum before and was super turned on thinking about it. She was enjoying the massager more openly than I expected. I kinda thought she'd just rub it up there for a minute and claim the dare. But, she stood out in the open, naked and vulnerable, letting me observe her masturbate. It was almost as if she liked me watching her. To be honest, I did like it. A lot. Without thinking about it, my fingers found were down into my PJs and under my panties. I rubbed the floppy skin of my labia, pressing until some slippery juice came out. I smoothed it up and down, fondling my clit and feeling my hips shifting in response.

Just a few minutes ago, we were bored in her room, watching youtube on her laptop.

"Truth or dare?" I asked her.

"Oh god, Ashley. Ok ummm...truth."

"Do you ever look at porn?"

She laughed out loud, embarrassed at the question. "Oh my god!"

"Well?? Do you?"

"Ummm...ok, yes. Sometimes..." she said, her eyes rolling innocently. "Like you don't. I'm so sure!"

"I didn't say I didn't!" I eyed her, her expression still showing embarrassment. "Let's look at some."

"What, right now? With a party downstairs?"

"They'll never come up here. They want to pretend we don't exist, come on." I involuntarily squeezed my crotch with one hand on the bed next to her as I said this, pleading with her.

"You little horn ball," she said, her eyes flittering down my body to see me grabbing myself. With a sarcastic tone, she added, "Ok, at least this isn't too weird."

"Xhamster.com," I said as she started to type. "Pick a webyoung one." She typed the word in and a page full of thumbnails of beautiful girls going down on each other filled the screen.

"Lesbian porn, really?"

"Shut up, it's hot," I said. She clicked the video and we watched in silence. One stepsister seduced another slowly, going down on her with her luscious lips as the two girls discovered each other's bodies. Over the coos and whisperings of the sisters I rubbed myself vigorously, making little squishing noises and shaking the bed as I watched both the video and my sister's reaction to it.

"God, it's so sexy..." I whispered. All I could think about was the little bump in Guinevere's sports bra where her nipple protruded slightly. Was she dribbling in her panties?

"You're such a perv," she said, noting my open wanking. What did I care? I was so fucking horny. I could see the arousal growing in her.

"Truth or dare?" I said again. "Say dare."

"Oh god. Ok. Dare."

"I dare you to go into mom and dad's bathroom in only your sports bra and use the massager that's sitting out on yourself."

"With all those people downstairs?"

"I bet you cum in less than two minutes?"

"And how do you know that?"

"I...mayyyy have tried it once."

She looked at me with an expression that said, "Of course you did." Without protesting, she stood beside the bed and without breaking eye contact, dropped her pajamas to her ankles, then slipped out of her pink panties. Her trimmed tuft of dark hair bounced free. She tussled it gently to tease it out. Beneath it, the dorsal "v" of her clit peered out from between puffy labia. Her vagina was eye level with me as I lay on the bed.

"What are you looking at? You've seen it plenty of times."

I looked up at her, my hand manipulating the aroused flesh inside my PJs. "I know. I like it."

"What's gotten into you tonight?" She said, with a slightly flirtatious timbre.

"Now your bra," I said, an unintentional breathlessness entering my voice.

She lifted her top, revealing the fair orbs beneath. My mouth watered. Gah, I was super turned on. I tried to scale it back a bit. "You have to take yours off, only fair."

I hopped off the bed and lifted my shirt off. My boobs tickled as the shirt pass over my nipples. She walked up to me and fondled them awkwardly. "I've always preferred yours." I stood still as her warm hands explored me, saying nothing, enjoying her touch. "You're awfully quiet," she said, smiling.

"It's nice, just enjoying it."

She tweaked one nipple, enjoying watching it harden up. I sighed gently. "To the dare, then..." she said.

She was tiptoeing down the hallway before I regained my senses. I followed her out the door, my breasts conspicuous in the hallway light. We snuck through my parent's room into the bathroom, both of us giggling. The massager is pretty heavy. She felt the weight of it as she looked at me awkwardly, flipped the switch to turn it on, experimented with opening her legs and placed it right on her clit.

"Ohhhh..." she said, exaggerating the experience at first. "Fuccckkkk that's amazing." She wiggled it back and forth before settling into a happy spot. "Shit," she said almost to herself. "Mom uses this doesn't she?"

I laughed, "Don't think about it."

"Ahhhh my goddddddd..." her eyes rolled back in her head as she moved her hips back and forth. It was so hot watching her. My fingers were dripping in my panties. I fondled my nipples and took in the subtle muscle spasms in her butt, the wiggling jerks of her breasts.

"You're enjoying this aren't you?" she said between gasps.

"Too much, I think..." I realized I was gawking. I had to lick my lips to wet them. My finger plunged into my slippery hole, ravaging my clit as she edged towards a climax. "Tell me when you're gonna cum."

"I'm close, ohhh unnghhh." Her head bowed down, her forehead tightening. She maintained her balance, the dark plume of pubes starting to bounce quickly above the vibrating ball of the massager. "Oh god, I'm cumming..." she whispered. It was marvelous. Her body lifted up like one of those giant inflatable characters at a grand opening. The orgasm seemed to expand up through her sexy body and emerge out of her head. The sound she made was like a plea. I realized I had heard it before, softly through the house at night. I knew the cadence of my sister's climax, like a song I remembered only after hearing it played again in some new context. God, it was beautiful. My fingers dug deeply inside my vagina, edging me towards my own precipice.

Before I could enjoy it long, she cut it off. I came back to myself, realizing where we were. Loud laughter erupted downstairs and my sister pulled the massager away from her body, placing it on the counter and turning quickly toward me to exit the room. As she did, she smelled her hand.

"Mom's pussy, oh god," she whispered. I erupted laughing. My fingers were in my mouth, enjoying the flavor of my juices as we tiptoed back down to her room. I could see shiny places of lube between her thighs as she turned to enter.

We closed the door quickly and fell on her bed, rolling around giggling until our bodies fell together and the soft warmth of our curves fitting together became more than we could resist. Before I knew what happened, her leaking vagina was in my mouth. I sucked the nectar from inside her, lavishing her warm, tasty flesh with my lips and tongue. In minutes she was contorted back in the covers, her grunts and gasps muffled as she erupted with a massive orgasm. Her lube flowed liberally into my mouth. I knew we had passed a point of no return. But, I didn't care. I loved her and it was super erotic to get her off!