Now that my niece Holly had stumbled in on her mother and me, nearly catching us in the act of oral satisfaction, I had to look over my shoulder whenever I had the opportunity to indulge in my risky affair with my sister in law. Not only did I have to worry about her husband catching us, I also had to keep an eye out for Holly and her brother. But only Holly seemed to have some suspicion.
Karin and I still stole away on every opportunity, fucking on the washertha in the laundry room, swapping hands beneath the dinner table, 69ing in the grocery store parking lot; but always with the possibility of discovery. Not that it didn't make it even more exciting.
One afternoon, I arrived at their house after an afternoon meeting, to find only Holly at home. As usual, she was dressed in short shorts, a tight spaghetti string top, and chucks. Her bra straps showed on her shoulders, and I made a joke about that. I immediately chastised myself for the inappropriateness of the remark, but she giggled and headed to her room. A few minutes later I was watching TV in the den, and she danced into the room. She flopped on the couch next to me, and looked up, "Better?"
"Huh?" I responded, not getting her drift.
She palmed her little teenage breasts and jiggled them. "Better?" My eyes were drawn to the mounds, her now-braless little nipples prominent beneath the thin fabric. Her breasts were the opposite of her mother's. Small and firm, little pencil eraser nipples, my heart began to jackhammer in my chest, my cock responded.
"Holy shit, Holly." I gasped. "Look, you can't be acting that way with me. I'm your dad's brother, for god's sake."
She giggled and rolled over onto her stomach, cradling her chin in her palms and smiling at me. Her legs bent at the knees, ankles crossed above her tight little ass. "Sorry, Uncle Mike. Don't want to make you uncomfortable." She pointedly looked at my crotch on that last word.
"It's ok, honey." I replied, trying to casually cover my hard on. "Just be my sweet little niece, ok?"
She gave me a little wicked smile. "But how can you know how sweet I am if you never taste me?" She rose to her hands and knees and very slowly crawled like a prowling cat until she was just a foot from me, froze, licked her lips, then crawled even closer. She stopped inches from my face, I could smell her fresh young scent, shampoo, cologne. She licked her lips again and half shut her eyes. I thought she was going to kiss me, but I was unable to pull away. I closed my eyes and held my breath. Then my 19-year-old niece licked me, from my jawline up the side of my face, running her hot little tongue into my ear. "Meow, uncle Mikey, she whispered. I'm just a sweet little pussy... cat."
I groaned and turned away. Laughing, she jumped up and jogged up the stairs, turning halfway to catch me locked on to her perfect little ass. "Like candy," she laughed. She pulled her shorts down a couple of inches, showing the first couple of inches of her ass crack and her smooth little bottom, and disappeared.
I almost packed my bags then. What would Karin say if she were to see this interaction? Hell, my brother would actually kill me, I had no doubt.
The next afternoon, as I lay in the guest bed covered in the scent of my sister in law, she rested her head on my chest and looked up at me. "Do you think Holly knows?"
I studied her concerned face. "Pretty sure she has her suspicions."
"You're right, she's been asking some pretty leading questions lately. And she asked me about going on the pill, but says that she doesn't have a boyfriend. I asked her why she'd want to in that case, and she just giggled and said that maybe we both ought to, just to be safe."
Karin's hand rested around my spent wet cock, and the thought of my niece's pussy being available to play gave it a little jolt of life. Karin raised up and frowned at me. "Hey, don't be thinking about my daughter while I'm lying here with your cock in my hand. I'm not sharing."
Her hand became her lie detector, and she asked, "You're thinking about her, aren't you?" My cock pulsed in reply, and she smacked the head.
I tried to reassure her, but now the seed was planted, and what could be a bigger turn on than the chance to compare the daughter's pussy to the mom's. Holly wasn't completely sweet and innocent, like the rest of the kids in my extended family. She had had her share of boyfriends, and had been caught more than once in compromising situations. Karin had told my wife and I some of the stories, and I always thought how lucky these teenage boys were to have a shot at such a stunning little sprite.
Karin began to stroke me, her hand lubed with the remnants of our afternoon affair, and I turned my attention to her. She rolled on top of me, and began to slide her slippery body across mine, her breasts so sexy when her nipples hardened against my stomach. My cock responded, as it always did to her teasing, and she began to kiss around my neck. Her voice now took on the sexy teasing little-girl tone she used to torment me. "Oh, does Uncle Mikey want to play games with his little teenage niece now? Do you want to see if her panties smell like her mommy's? I bet she'd like to wrap them around her uncle's big cock and watch it get big and hard for her."
Sure enough, she had me completely erect now, and she laughed in victory. She sat up and swung a leg over me, sitting on my thighs, and holding my cock with both hands. "Does Uncle Mikey want to wait for Holly's tight little pussy? Or does he want mommy to slip it back inside her pussy? I think he wants mommy's pussy." She began to slip it fore and aft along her dripping gash, the cum from our love-making minutes before lubricating it, and sliding up, she straddled my pelvis. My cock rested against my body now, and she spread her labia around the shaft. I watched a glob of cum leak from her hole and drop onto it.
Karin lowered herself completely onto me, and began to slowly glide back and forth, her lips enveloping my cock in their slick wet groove. Back and forth, wetter and slicker. My cock would completely disappear, then burst forth as she moved back. I don't know how I didn't cum, it was so incredibly stimulating.
She rolled off of me now, and spread her thighs, her feet resting on the bed, her pussy splayed open. It was an absolute mess, her matted pubic hair smeared with cum, her lips hanging beyond it, swollen and red. A small trickle of translucent cum ran from inside her, down below her pussy, across her anus. Karin held her arms out towards me, "come here, Uncle Mikey, come here and fuck my little pussy before mommy comes home."
I rolled over and knelt above her, between her thighs. She was so incredibly slutty and sexy like this, lying there smiling at me. Her blonde hair spread across the sheets, her breasts still flushed pink, nipples erect. Not a shred of self-consciousness or shyness. I still was blown away at the change in her since our affair began. "I'm sorry my pussy is so messy," she whined. "I didn't mean to, but I let my boyfriend squirt in me after school today."
I grasped Karin behind her calves, and yanked her towards me, then dismounted the bed and pulled her to the edge. I lifted her feet into the air, her ass hung a few inches over the edge, the cum now dripping onto the carpet below. I stood there, smiling back at her, then spanked her ass with my right hand. "OW!" she yelped.
"You bad little slut," and I smacked her again.
