My niece

My name is Andy.i am 40yrs old and married to Tina 35yrs old.we dont have any kids yet.i had a sister named Christina but she died in an accident with her husband leaving their daughter to live with us.her name is Lisa.she is 18yrs old and was going to college now.we were taking care of Lisa as our own daughter.the problem began after she started to mature.even though she is just 18.her body looks like 25.Lisa is a real blonde.she wears 36d bras so i knew her tits size.her ass is also big and pear shaped.Lisa walks around the house in skimpy clothes.i know its wrong but my cock doesnt know it.my cock gets hard everytime i see Lisa in skimpy sexy clothes.Lisa is a very obedient good girl as far as i know.she doesnt even have a boyfriend.but i started having wrong kind of feelings for Lisa.i began sneaking peeks at Lisa when she is not watching.i even began peeping in her bedroom and even in the bathroom.i have seen Lisa naked now plenty of times.her body is just amazing for an 18yr old.she has a little patch of pubic hair just above her pussy.Lisa has a best friend named Anna who is also her age.Anna comes often for sleep overs in Lisa's room.one night when they were having a sleep over and Tina was asleep and i couldnt sleep so i got up into the living room.i heard some noises coming from Lisa's room.i peeked through the keyhole and my eyes almost popped out of my head.Lisa was naked legs spread in the bed and Anna was fucking Lisa's pussy with a strapon dildo.Lisa was moaning softly trying not to make much noise.i pulled my cock out and began jerking off to the sexy scene infront of me.Anna kissed Lisa on the lips while fucking.i couldnt control anymore and splashed my cum on the door and doorknob.Lisa heard the noise i made when i came and got up to look.i ran away from there before they caught me with my cock out.Lisa didnt say anything after that.but i was pretty sure that they would have seen the cum on the door.one day Tina had to visit her mom who lives in another city cuz she was sick and had to stay there for a while.that left Lisa and me alone at home.the day Tina left Lisa didnt speak to me all day.i thought she was mad at me for that night.cuz there was other man at home to do that and that cum was mine.that night Lisa made dinner and we ate in absolute silence.after dinner i helped Lisa with the dishes and went to the living room to watch some television.i was on the couch watching television when Lisa came and sat beside me.we didnt speak for about 15 minutes.then Lisa looked me in the eyes and said that she found some sperm on her door knob.i didnt know what to say and was just looking at her.she got close to me and said that she knew it was mine and that she licked those and swallowed the sperm that night.she said that after she tasted my cum she was craving for my cum and was dying to taste me again.by now there was a big tent in my shorts.i didnt even know that i was rock hard by just her talking like that.she saw the bulge in my shorts and knelt down infront of me.she didnt hesitate even a little and just pulled my shorts down.i lifted my ass off the couch to help her take my shorts off.i was now hypnotized by the hot sexy girl infront of me.she just looked me in the eyes sexily and and licked my cock from my balls to the cockhead.then she began sucking my cock.playing with my balls.her mouth was so hot.she was wearing a robe.i untied the robe and it fell off her shoulders to the floor.her big beautiful boobs were jiggling while she sucked my cock.i played with her tits and twisted her nipples making her horny.she put my cock between her juicy melons and jerked my cock with her boobs.i tittie fucked her for a while and couldnt take anymore and came gushing a gallon of cum between her tits.she sucked my cock clean sucking every last drop of my cum in her mouth.she even scooped the cum on her tits and swallowed.she didnt even say a word.she took her robe and walked away to her room swaying her beautiful ass.she was wearing just a g-string.i got up and cleaned up and slept in my room.i woke up next morning with a raging piss hardon.then only the images of last night came to my mind.i gathered the courage and walked to Lisa's room.i opened the door slowly and she was fast asleep totally naked on her back with her legs opened about a feet.slowly i got on the bed silently trying not to wake Lisa.i took a closer look at her young pussy.it was glistening.i got my tongue out and licked her pussy lips.she stirred but didnt wake up.i parted her pussy lips and licked her clit.then i kept on licking her clit and i felt 2 hands on my head.Lisa was now awake and horny.she began moaning and i kept on eating her young teen pussy.i played with her tits while i ate her pussy.i rolled her on her belly and parted her bubble butt cheeks.then i began to lick and suck her puckered asshole.by now she had several orgasms.then i poured some oil i found on her dressing table and poured onto her big ass and onto my cock.i rubbed the oil on her ass massaging her ass.then i aimed my cock to the entrance of her asshole.then slowly but firmly i began pushing my cock in her hot ass.i began fucking her ass while she was on her belly.i lifted her torso a little and grabbed her tits.i even pinched her nipples and it drove her so wild she humps her ass up and down.then i lifted her into doggy style with my cock still impaled in her ass.i fucked her ass hard and fast.she was moaning hard.then i pulled my cock out of her ass and rammed it in her teen pussy.which made her gasp.i parted her butt cheeks and began fucking her pussy.she was moaning like crazy saying things like 'oh god yeah. Oh fuck me uncle.yeah fuck that juicy pussy' it got me so horny hearing her talk like that.i just drilled her sweet pussy hard and fast and came gushing deep in her pussy.she orgasmed hard shaking her whole body and just collapsed in the couch.she was so exhausted and breathing heavily.she looked so sexy so beautiful.i lifted her and laid her properly on the couch.i kissed her in the lips.still she had her eyes closed and breathing heavily.i put a blanket over her sexy nude body and went to take a shower.i was taking a shower and the bathroom door opened and came in Lisa.she was still nude and i saw my cum dripping out of her pussy and trail down her sexy legs.i pulled her to me and kissed her on the lips.i fucked her juicy pussy and ass again in the shower and came in her mouth and she swallowed the cum.then we showered together.we fucked in various places in the house in various positions before Tina returned.after Tina returned i was having difficulty in having a chance to fuck Lisa.all we could do was have quickies when Tina was in the house.but still we tried and fuck.i loved Lisa so much.but after all she was my niece. Fucking was the only thing we could do... the end