I am 18 and she's 24 at that time we used to be living in samll apartment and our family was big(2 brother and 2 sisters plus parents) and my computer was in my sister's room, one day i desided to film her while she changes after she get back home from the work. so i setup my webcam (it was so cheap with low video quality) and she arrived i had to get out of the bedroom other whys she could changed her dress in the toilet so i left and she locked the door i was waiting for arround half hour and she came back i start thinking what could she doing there in 30 mins i start worring mybe she found the webcam on or something, but she came out with his sleeping dress, she had very good body with nice tits, i had always thoght how i can get my hand on them, (i tried lots of time just feeling them and did ), so i went to cheak what my webcam cought," ohhhhhh God" i said i saw most beutiful as in the world and then while was undressing i saw her taking of her bra and his beutiful tits showing off (the most importent thing i wanted to see in her entire body). and she was massgning her tits i felt a big shock o my penies and precum was covering it as my heart was bumping faster. as i said before my cam was notgood so i couldnt see her pussy( i was so pissed), then she disapeared from cam's view, she was not apearing for more then 20 min's i was wondering what she was doing then suddenly i saw she got up from the floor with her hand on her pussy i didnt botehred it. and she got dressed and i was shocked that she didnt put here bra and panties on, just a sleeping dress but notting was showing thro it. clip ended and i empty my load. i was so exciting of what i saw, the next day i filmed her again and once again she took about 30 min to get out and same thing happend she lied down and disapeared from cam i that time doubted that she may be Masturbating i never thought my inoscent sister does Masturbat, next day i set the cam in a direction that will face down on the floor so i could see what she does in 30 min, as usuall it was arround 3 Pm and she arrived and she looked littler tired and horney, she went to her room and closed door this it took almost 50 mins went near door and i heared a very light sound, AHHHHHHHH< OHHHHHHHHHHHH. i couldnt handle it more finaly she came out and i rushed in to see the video, she just drop her self on the floor and took his panties on start Masturbating just i thought and yes she was screaming after 40 min she finaly cumed and got on her feet and changed his dressed and i saw my self in video rushing to the pc (lol), from that day i said to my self i should help her and my self. next day she came home i told her to drop me some where (she had car) while we were in the road i dont know how but suddenly it came on my mouth u Masturbate "What...huh...hmm" she said and she while she was shacking she said "no.. i dont" i said i have proof i filmed u with the webcam "ohhhh no" "so what u want now" i was freakin and shacking and once again it just came out of my mouth "i can help and u can help me" she was like "errrrrrrrrrr, what u mean" i said comon u know that why do it urself when u have somebody to do it for u, she started to getting it "OK so u want to fuck me" yeh i said " u can enjoy it to" "but this is wrong" i know but who cares she said i must think of it 1st, i said ill use condomes and protection so there will be no risk. she said ur pretty smart and i Laughed, " so what u think" she said well as far as nobody knows am ok with it. i harldy could stop my manhood to wake up and she was keep looking at, " do u want it" she ashamed and said "yes, who long ist" i said to her it long enough to hurt u(it was arround 9") . "what now" she asked "do u know any good place to stop by and have a fresh startup of what we're going to do" i asked her. "she said how about my car" as her car was big enough to have a fast sex, she found a good spot where no building was there, i took the 1st step by feeling my most favorite thing "TITS" from out of her dress, she droped her head back and moaning "ohhh that feels good" she said, "that's begning sis" i said back to her. as there was a risk of cops i didnt ask her to take her clothes of but i took my hand in her dress and pulled her bra down, God damn its was so hot tits and he nipples were so ticked, i squeezed them for couple of min and went to next station "Pussy" she didnt wear any panties at all this time i asked her why she said "it was hot today" so i felt cums all over her pussy i thougth mybe somebody fucked her today before me, any way i didnt care and start feeling her, it was damn hard and i was so pissed i couldnt do much except touching as we were in car. i opend her long balck hair and smell then while kissing her lips "ohhh no kissing please" she yaled , ok sis i responed her. i said it your turn sis, she took her right hand to my zip bringing my cock out " OHHHH WOW.... So Big... this aint Fitting in me" she said once again i Laughed. she started to taking it to her mouth and sucking it, since it was my 1st blowjob i like it too mcuh and grapped her hair and pushed it down harder, she said i cant take it full inside "it will not take much time am cuming just wait little more" i responded her, after 3 min of sucking i camed and all my spersm in her mouth, she slapt me and grapped a tisue box and cleaned her mouth, "dont u like that" i said "well i like it but not a glass of it " she yaled, i was damn Laughing. then she start her car and we were on our way back to home, in our way back to home i asked her if we will do this again "yes sure... why not" and i was so exsited . after 1 week of waiting for good time my parents finaly planed going out some where and taking us too, "will u come with us" father asked me and my sister in very fast way " no i dont feel to go out" i said my sister understood that we have chance of having a long sex "i wont come dad" she said that too , well my dad didnt bothered and next day they went out with my lil bro and 2nd sister, i couldnt belive we were home alone, we keeped calmed for 30 min to be sure nobody will come home back, then she said wait i have a suprise for u , she went in her room a closed the door "hey cam is on sis" i said to her in funny way and she Laughed, so she came outwith very sexy black color dress my manhood was ticked and forcing to come out of the pants i didnt waste time nd took my pants off and she said cant u be patent and play for a while before goign to main event, i said not and grabed her by my arm and took her to the bed and as i said i didnt waste my time at all and start pushing my cock in her, "be carefull not to hurt me" she said "ok dont worry, ive seen lots of porno" she Laughed in very loud voice so i fucked her and fucked her till i was cumin, i rememberd she told me not to cum in her pussy so i took my dick back out and she started to suck, i said sis am cumin and u dont want it in ur mouth so let it go "no i want it this time" i was more excited i as i found my sis is more bitch then i thought. its been 2 years sice that time and almost do it once a week or when we get a chance.