blackmail at uncle money bags

it was a weekend in july and there was a heat wave, it had to have been at least 100. My parents are seperated so my dad told my sister addy and i we could take his car up to maine to try and beat the heat. My uncle owned a fairly nice house, it did not show off how much money he really had. he had been through 2 marriages and had no kids so he had nothing to spend his money on.
abby is 17 and going to be a senior in HS, i’m going to be a freshman at the same school. i know all about who she hooks up with, i’ve even spied on her when she has differnt guys over…..i get a step latter and peek in through th second floor window in back of the house. no neighbore can see me there. i watch her take control of the guys she is with, it makes me so hard. She’s 5’10 130 brown hr green eyes, hair goes a little past her shoulders. she has a very thick full curvy body with having any extra fat on her. She has long thick smooth athletically toned legs that she loves to show off with her mini skirts. then there is her flat stomach that leads up to her 34 Ds that are impossible not to stare at. she plays soccer and volleyball so shes in perfect shape. I loved watch her aggresivelly push her boy toys on the bad and straddling them. she would slowly take off her shirt while she would grind her crotch into his hard cock. she always had control of the sex, she was never on the bottom, she loved riding cock or getting slammed doggstyle. shes a party girl she like to drink, smoke and worst of all she does coke, which is something i never liked about her.
so if there was one thing i would change abou her it would be her coke habit
so the two of us were all ready except abby had to run into the bathroom, i thought this would be a perfect opportunity to go threw what she packed so i can tak a look at her panties and bras, i dont know hwat it is about me but i love going through her panties, it makes me so horny. so i was snooping around in her luggage whne i came across a vile of coke. i took it at first because i dont want her doing it, but then more sinister plans entered my head.
so we are in the car on our way up to maine, abby doesnt know i stole her coke yet so we are just having a casual conversation.
“so hows steve?”
“hahahaha, that little boy didnt have what it takes”
“what do u mean? you two have only been together for 2 weeks”
“hahaha, was it that long? he was so small i didnt realize….hehehe”
“haha so hehad a small dick?”
“you guested it!”
“my sis loves her cock nice and big…hahaa”, i said jokingly
she winked and said, ” i dont love my cock nice and big i NEED them nice and big”
“uhhh ha ummm, ya” i didtn know what to say, my sister loved to see me flustered by her sex appeal. i’m not used to talking tomy sister like this.
it was nothing but queit for a few minutes after that, all i could think of was fucking my sister. what the hell am i gonna do, i have 2 hours left in this car i might need to make a rest stop to releive my self from my raging hard on.
“so, kev, tell me about the women in your life, you seem to know what i like, what about you?” abby asked curiously
“i like hot girls with a round ass, long legs and big tits….duh….hahha.”
“so u are picky i see, u only go for the best, what lucky gives have u hooked up with?”
“dont make fun of me!”
“what?”
“its not like i havent been with a girl i just never had something done to me…..ya know” kevin said with a hint of embarrasment.
“a cute guy like you should have a girl for everyday of the week” abby proclaimed
“am i really cute?”
“nope, actually i was just saying that…….i think u are more hot than cute but i didnt want u to feel weird about ur sister telling u were are hot.”
“thanks abs, now all i need is a nice big cock and we were made for eachother……haha just kidding.”
both of our faces are red and we think this conversation has gone a little to far to i decide to take a nap for the rest of the car ride.