Mandi and I had been lucky not to get caught. She'd come over three times that week, and I'd fuck for hours. Mandi's taught young body, fueling an insatiable fire in my cock. She would suck me off, while I licked her cunt to multiple orgasms. She could not be satisfied, always pining for the next big climax. I had to tell her that we needed ton back off, just a little, we were taking too big of a risk meeting so often. It's been about a month since we'd last been together, and I was beginning to think that I'd hurt her feelings.

My other niece, Tina, was having a birthday this Friday. I figured I might at least I'd find out if Mandi was pissed at me. Friday night when I got to the party, Mandi was nowhere to be found. I asked Tina what was up, why would her sister would miss her birthday.

"Mandi's been on a class trip, Uncle Mike. " she said, giving me a peculiar grin. "She'll be home on Sunday."

I let it go for now, maybe she had been too excited to mention it. Besides it's not like we do a lot of talking when we are together. Throughout the night, at Tina's party, she kept giving me that same curious, knowing, smirk. Tina definitely was my second favorite, of all my nieces, she's sweet and cuddly, fun for an uncle to pick on, just like her sister. The both of them are really close, being born only a year apart. Tina, looks a lot like her sister, only shorter, imagine DD tits on a petite 5'2" frame. Long blonde hair, and the same deep, blue, eyes as the rest of our clan. Both girl's remind me of their mother at their age. God my sister was hot back then, we'd fooled around in our late teens, but never fucked, and I've regretted it my entire life. I thought she wanted to once, but both chickened out.

About eleven thirty, I began saying my good-byes. Tina ran up and grabbed me, the smirk that never left her face all night still present.

" What's up T ?" I asked.

"Aren't you forgetting something?" she asked coyly.

"No, I haven't. " I walked over to get her card from my jacket. "Here you go." I said kissing her on the forehead, as I gave her a hug. "Happy birthday."

Tina hugged me back, tighter than she ever had before, it caught me off guard as she pressed her tits to my chest. I wasn't sure, but I thought I felt her hand brush my ass, as she was letting me go. On my drive home I couldn't get it out of my head. Did it really happen, or was I hopefully imagining it? I had a few more drinks when I got home, just to help put it out of my mind enough to sleep.

Sunday came and went with no word from Mandi, I was beginning to think about the consequences of being caught. Monday, when I got home from work, Mandi's car was in my driveway. Finally, I thought, Id find out one way or the other. Mandi greeted me with the same passionate kisses from our last meeting, deep soulful kisses. Our tongues entwining with the others, and our hands running over each others bodies.

"Oh gawd, I thought you were pissed off with me." I said, when I came up for air.

" I was, but I'm too horny to resist you. " she smiled. " Now I really need a good fucking."

Mandi pulled herself up into my arms, and thrusting her hips to mine.

"I have a surprise for you. " Mandi shielded my eyes with her hand. "Close them Uncle Mike."

I did as I was told, curious as what she had up her sleeve.

" Ok, you can open them." she said.

To my shock, and horror, her sister Tina was standing next to her. I couldn't believe what was happening, my biggest fear was unfolding before my eyes. We got caught, Tina had been in the next room, all the while Mandi was grinding her cunt on my growing cock. They were both grinning at me, as Mandi tried to explain. Tina had seen Mandi's car over here each time she had come over that week. She had been giving a friend a ride home the first day, but after the second she had gotten suspicious. She confronted Mandi about it that weekend, and demanded the truth, or she would tell My sister. Mandi had confessed the whole thing to Tina, and she was afraid that I'd find out that she told. That was why she hadn't called, or had come over.

" But two weeks ago" Mandi continued, " I caught Tina smoking pot in her room, she promised not to tell on us if we do her a favor."

"And what is that?" My frustration very evident in my tone.

Mandi tried to get Tina to tell me herself, but she was too embarrassed to voice her request. Finally Mandi said it for her.

"She said she wouldn't tell, if you'd do to her what you've been doing to me. One thing though, you have to promise to go slow, cause she doesn't want it to hurt when you take her cherry."

I looked Tina straight in the eye.

"Is that what Friday was all about? " I asked. " You did grab my ass. "

Tina's face turned beet red, as she nodded in response. Her voice stolen away, she still couldn't voice her desires for herself. That wasn't good enough for me, I needed to hear it for myself.

"Then she has to ask. I want to hear it from her own lips, or you can both leave. I'm not going to risk getting caught if she changes her mind!" I said, waiting for a reply.

I waited for what seemed an eternity, before Tina could bring herself to respond. I saw a hint of a tear building up in her eyes. I turned to leave the kitchen, only getting about three steps.

"Wait!" Tina said, " I do. I want it, I want you to be the one to do it. I've been too afraid, even when I play with it. I'm afraid it'll hurt too much. Please, Mandi says you make her cum every time she come over. I want you to do me too."

I looked at Mandi . "Is this what you want too? I want to be sure your both Ok with it before I do anything." Again I paused for an answer. " Do you plan on joining in?"

"No." Mandi said, "I'm going home to cover for Tina's absence. We can do that some other time. Tina likes it when I lick her hole."

After Mandi left, Tina crossed the room to me.

"Mandi says she loves the way you kiss her." Tina said bringing her lips to mine.

Her first kiss was soft, gentile on my lips, she parted her lips, allowing her tongue to venture into my mouth. I let her take the lead, not wanting to rush her, and give Tina every avenue to escape if she changed her mind. With Mandi, it had been raw animal lust, but Tina was the unknown, a means to loosing her virginity. How much more would be left to be seen. I cautiously let my hand slide up her side, til it rest on her breast. I squeezed it gently half expecting her to bolt any minute. Tina brought her hand up to pull my lips harder to hers, not quite to tall enough to wrap them around my neck. I hugged her close, keeping my hand on her large, firm, tittie.

Our lips parted, "Are you sure about this T. " I asked, wanting to be reassured before going further.

"Yes Mike, Mandi says that you'll be gentle with me, and you wouldn't hurt me."

"She's right, but it still might hurt a little you know." I said.

Tina nodded as she brought her lips back to mine. This time I pulled her up in my arms like I'd done to Mandi. Tina tried to wrap her legs around me, but they were just a tad too short. I swept her off her feet, carrying her to my room in my arms. I sat her on the edge of my bed, and sat beside her, fondling her young breasts, as we continued to kiss.

"Unbutton this" I said, pointing to her top.

She slowly removed her blouse, bashfully looking down at the floor. I reached behind her, sliding my hands down her back to the clasp on her bra, unhooking it easily with the fingers. Tina looked up at me as I pulled her tits from beneath the cups. I touched her bare tit, circling her nipple with my fingers. Tina's large areola responding to my touch. I pinched it slightly, bringing a giggle from my niece.

" That tickles Uncle Mike." she said.

I pushed her back on the bed, sliding up next to, so I could suck on them as I rubbed my hand between her legs. Tina slid her hands down to her pants, and started to slip them over her hips. She lifted her hips to allow them to glide over her ass cheeks. Tina panties came off with her pants. I aided in their removal, pushing them down past her knees. I glanced down between her legs, wanting to see if she had a blonde bush like her mother. Tina's sweet, young, pussy lips, were bare as the day she was born. There was a small triangle of bright blonde pubic hair, just above her clit. I sucked a nipple back into my mouth, as I slid my hand up her thigh. When I touched her pussy for the first time, she flinched slightly. I pulled her legs apart to give my fingers access to her pussy lips. I repositioned so I could kiss her some more, while I stroked her vulva.

Tina's kisses had increased in intensity, her tongue eager to be between my lips. Her juices began to lube her lips, allowing my finger to push past her outer labia folds. I found her clit, and made small circles, as I ran my fingers over it. Tina's body stiffened as she climaxed, her breathing deep, and halted. I lowered my mouth back to her nipple, sucking it hard as I slid my finger in her vagina. Tina gasped as my finger penetrated her cunt slowly, rubbing her clit, as my finger slid deeper. Tina's hips began to rock, slowly humping my finger. I dug deep up her sweet, tight, pussy. I twisted and hooked my finger, in her trying to stretch her carefully.

I remembered doing the same thing to her mother years earlier. I broke her mother's hymen with my fingers, and foolishly passed up the opportunity to fuck my big sister. Here I was repeating the same sorted scene, incestuously taking my nieces cherry. Tina spread her legs wider, as I tried to slip a second finger between her pussy lips. She arched her back, trying to pull away from the expected pain. I bit her nipple slightly drawing her attention away from the penetration of my fingers.

It worked like a charm, just enough distraction to allow my to get them in. I slowly worked them in and out of her dripping pussy. Her virgin juices flowing over my fingers, as I glanced down to see if there was any evidence that I'd broken her hymen. Even after taking two of my fingers it remain intact. I could tell Tina was tensing, so I would try a different approach. I slid between her legs, lifting her knees, as I lowered my lips to her sweet, young slice.

"Oh god Mike whatever your doing don't stop!" she screeched, while pulling my face harder against her pussy.

I knew I could get her to relax if I could make her cum some more. I licked her clit, as I slipped my fingers in her faster and faster. I'd suck her on hooded specter, digging deeper in that tight teenage cunt. I continued til I tasted the coppery flavor of blood, I'd stretched her enough to make her bleed. the rest should be pain free. I was careful not to let Tina touch, or see the size of my cock. I didn't want her to freak from its size, and panic thinking that it would never fit in her tiny hole. I made Tina cum about a dozen times, each one to a new heightened level from the previous. Tina twisted and writhed beneath my mouth, as I lashed her clit with my tongue, culminating in a gigantic orgasm that rocked her body.

I raised up away from her vagina, wiping my face and fingers with my shirt, just in case any blood may be present. There wasn't much, and I left the shirt next to me, to use after I busted my way past her fleshy barrier. I knelt between her legs, unzipping my pants. Tina's eyes were closed, still riding her climax. I placed the tip of my cock at the entrance of her vagina, rubbing it over her clit, before pushing it back at her tiny opening. Tina's plentiful juices dripping from her lips. I pushed forward, attempting to just get the head in. I leaned forward resting on my hands, leaving my cock head at the entrance of Tina's love hole. I placed my lips on her nipple sucking it as I rocked my hips slightly, gingerly, working my head deeper, between her lips. I nibbled, and bit her nips. Sucking hard, again trying to use diversion tactics. Tina was wincing, from the pressure. I raised my upper body up, so I could reach between us. I started rubbing her clit again, she had cum hard the last time I'd done it, and it was worth a chance.

I rubbed faster, and with increasing pressure, hoping to take her mind off the pain of her stretched hole. Tina began to pant, as another orgasm approached. I kept rubbing intent on breaking through, and driving my cock up her virgin hole. Tina began to whimper and whine, as her body was propelled toward another huge climax. As her orgasm hit I pushed the head of my cock through her hymen, popping her cherry almost painlessly. My cock met little resistance once inside of her, and easily slid deeper up my nieces vagina. I stopped about half way in, to give Tina a chance to catch her breath. She surprised me by hooking her heels on my hips and pulling me deeper.

"Does it hurt sweety?" I asked concerned, not wanting to hurt her any more than she already did.

"Yeah, but the good kind, the kind that you want more of."

I allowed her to pull me in as far as she wanted; which was almost all of my cock. I pulled against her heels, to take a stroke, or two. She let me pull out a little, before pulling me back in. With each slow long stroke she pulled me deeper, til my balls rest on her ass cheeks. Tina let out a long breath, as if she'd been holding it the whole time. I increased my pace, now drilling my cock in her cunt. Tina slowly humped her hips to mine, first with small undulations of her pelvis, but building in speed and pressure. Tina's mouth hung open, taking in huge gulps of air, as she pumped faster against me. She was beginning to enjoy this experience of having her cunt stuffed. My nuts slapped against her ass, as I pummeled her pussy. Our bodies entwined in ecstasy, my lips melded with hers. Passion flared within her, as she was taken over, possessed by pleasure.

My hands running over her body, across her heaving breasts. I found her nipples, tweaking them firmly between my fingers, and drawing heated growns of passion from her lips. The pressure building in my sack, yearning to be unleashed. Tina's body convulsed beneath mine, shaking from another series of orgasms. The quivering sensation on my shaft, driving well past the point of no return. I stabbed my cock deep in my nieces tight pussy, burying there, as it spewed forth my hot sticky seed, into the farthest reaches of her pussy.

"Oh god uncle Mike, I can feel you squirting inside me. It's so warm, ahh fuck I'm cummimg again." Tina panted.

Tina pulled my lips back to hers, as simultaneous orgasm subsided, kissing me passionately, while pleading that this wouldn't be a one time thing. I extracted my cock from Tina's tight cunt, to lay beside her. She got her first look of what had been pleasuring her. Her mouth fell open in shock, that my huge cock had been in her cunt. Tina took it in her hand, its size dwarfing her tiny digits.

"Holy shit Mike, You fucked me with that? Mandi never said anything about you having a huge cock." Tina was in awe that her petite virgin hole could accommodate my cock.

"Tina it's not that big, but thanks anyway. It just looks big because it's your first." I said pulling her to my lips. "And no this will not be our last time together, I know your sister wants to join us. I could see it in her eye."