Jane's sister: The penetration test.

When Jane asked me to help with something involving her sister, I had no idea what she meant. She just said, "Wear something light. There might be physical activity involved." I came curious, but completely unprepared for what was waiting.

Both of them were already at her place, Jane and her younger sister. They sat down beside me on the couch, one on each side. Then Jane leaned toward me, her voice soft but charged.

"Listen," she said. "My sister's been teasing me for a while about our… experiences. I told her a few things. Didn't exactly hold back the details…" She gave a bashful smile.

Then her voice turned serious, excited, but calm. "She's never been with anyone. Ever. And I think it would be better if her first time was with someone I know… someone who's already been inside me."

I froze. Was she really offering me her sister?

"She wants to," Jane added. "I know it. One time I even caught her with a picture of you — her hand deep in her panties, already trembling. She was just about to orgasm." She gave a tiny laugh, and then: "Of course, it all depends if you agree. I'm not sure she's your type."

I nearly laughed. I'd seen her sister before, tight yoga outfits, short gym skirts, even a bikini once. Every time, I'd had to fight to hide my instant erection. Right now? I had no desire to hide it at all.

"I'd love to be with your sister," I said, my voice low. "She's absolutely my type. And I hope I can make her feel… amazing… when I'm inside her."

Jane smiled, knowingly.

"I just have one request," she said.

"Name it."

"I want to be present. I want to make sure she's comfortable. I want to see how she reacts. Maybe even… give her some advice."

My member throbbed hard. Jane wanted to watch me penetrate her sister, the same member that had been deep inside her so many times. My body ached with desire.

She stood. "Let's go to my room," she said. "It'll be more comfortable on the bed Her step left to "get ready," and returned a few minutes later in just a sheer bra and half-transparent panties. Her tiny nipples were clearly visible, taut and flushed. Between her thighs, a soft triangle of hair, and beneath it, the unmistakable shimmer of arousal.

She caught my gaze lingering on her body and smiled. She even looked down between her legs, saw what I saw… and looked proud of it.

I sat on the edge of the bed, my boxer briefs tight, bulging. Jane looked at my erection and licked her lips. I could feel the tension in her, she was supportive, but I could sense the jealousy too. She wanted to be the one about to get penetrated again.

Her sister approached and reached for my boxers. Her fingers touched the swollen outline of my member , and I gently stopped her.

"Wait," I whispered. "Take it slow. I want to feel every second of this."

She peeled them down slowly. My member sprang free, long, curved slightly upward, visibly veined, still glistening from the tension. Her breath hitched. She stared at it in silence, then touched the tip, tracing the ridge with a delicate fingertip. Her skin was trembling.

Jane sat nearby, watching us both. "It's okay," she whispered to her sister. "He'll make you feel incredible."

I guided her gently down on the bed, spreading her legs. Her pussy was pink, snug, wet and untouched, like soft fruit waiting to be bitten into. She was nervous, but her hips shifted slightly as I leaned in and gave her a long, slow lick.

She gasped.

I circled her clit with my tongue, dipping between her folds, tasting her for the first time. She moaned, soft and desperate, her legs twitching. Her breathing quickened. She was ready.

I positioned myself, my member hard and glistening, and pressed the tip against her entrance.

"Are you ready?" I asked softly.

She nodded, biting her lower lip.

I pushed in, slowly, inch by inch.

She was tight. Her pussy clung to me like a fist, pulsing around every centimeter I gave her. I paused to let her adjust, then eased deeper. Another inch. Then more. Her eyes fluttered. Her body trembled.

Jane stroked her sister's thigh gently, whispering encouragement. "That's it… take him in… You're doing so good."

I started to move, slow, deep thrusts. Her walls clung to me like silk wrapped in heat. She whimpered, then moaned, then clutched the sheets, her body quickly learning the rhythm.

Her hips began to move with mine.

I could feel myself getting closer, my body trembling with restraint.

"I'm close," I whispered.

Jane stood, stripped in seconds, and lay beside us, completely naked, legs spread.

"Cum in me," she said. "Not her. Fill me. Let her see what it looks like when you lose control inside me."

I pulled out of her sister, slowly, her pussy fluttering around the sudden emptiness, stretched and dripping. I slid into Jane in one hard thrust. She moaned loudly, wrapping her legs around me, hungry to be filled again.

And I climaxed.

Hard.

Thick streams pulsed from my member deep into her. Her body arched, her arms clutching me close as I spilled everything inside her.

Her sister lay next to us, eyes wide, thighs open, watching every thrust. Her fingers had found their way between her legs, slowly stroking herself, clearly overwhelmed by what she'd just seen… and what she wanted to feel again.

And then, as I pulled out of Jane, my member slick with semen and her wetness, the younger sister looked at me, her voice suddenly soft, curious, aching with desire.

"Can I… touch it?"

Before I could answer, Jane nodded for her. "Go ahead, sweetie. It's all yours now…"

She crawled toward me, eyes fixed on my member, still half-hard, shiny, twitching slightly. Her fingers reached out, brushing along the shaft, spreading the mixture of Jane's juices and my semen with delicate, fascinated strokes.

"It's so warm…" she whispered.

She wrapped both hands around it. Her grip was gentle, almost reverent. She started to stroke it slowly, up and down, twisting her wrists, letting the slickness make her movements smoother.

My whole body reacted. I gasped. She was playing with it like it was a new toy, teasing the head, stroking the thick base, sliding her hands in a rhythm that sent shivers through me.

Jane watched, biting her lip.

"Make him climax again," she whispered to her sister. "Finish him… he wants it."

The younger girl smiled, a mix of mischief and pride, and stroked faster, massaging my shaft with both hands, focused on every twitch and gasp. Her eyes were locked on mine.

"I'm going to....," I warned.

She didn't stop.

She stroked harder, faster, more deliberate, and then I exploded again.

Semen spurted from the tip, painting her hands, splashing on my belly, dripping onto her arm. She watched it come out, fascinated, then looked up at me with glowing eyes.

"I made you do that?" she whispered.

"You did," I panted. "And it was amazing."

Jane leaned in, kissed her softly. "Next time," she whispered in her ear, "you're going to ride him. On top."