hello my name is Seth I was married for 12 years when I got a divorce. I was 31 years old when this happened. My buddy called me and asked if I would help him drive a dump truck he got. It was about 200 miles from where I lived but I was not busy and my older sister Jill lived down in that area. She is 6 years older than me and I had not seen her for about 10 years after she got married. Any way to get to the point I helped my buddy and was heading back home and was getting pretty tired. I was closed to Jill's house so I called her and asked if I could come see her and stay the night. She was surprised to hear from me and said it would be good to see me again. So after about an hour I pulled into her driveway and knocked on the door she met me at the door and give me a big hug and said come in. After I sat down I noticed that her husband was not there she said that they had got into a big fight and he went to stay with his family in another state. I asked her what they where fighting about and she told me he would not pay her any attention. She said he said he had a problem with getting it up and after several months she made him go to the doctor and get some Viagra. But even then he told her they didn't work. She said she thinks he is having an affair but cant prove it. I told her he must be fucking crazy because she is a good looking woman and I was not just saying that I. she blushed and said thanks little brother. I asked her If there was anything I could do to help her to prove he was cheating on her. she said how could we prove he was not telling her the truth and maybe the Viagra didn't work on him or whether or not he was even taking them. I told her there is one way, give me a couple of them and if the pills weren't any good we would know. with out either one of us thinking about it she went and got two Viagra pills and a class of water and handed them to me. I took the pills and we sat down she went and made me a beer and asked if I was hungry. I told her I stopped and got something on the road but would like to take a hot shower if it was ok with her. She got me a clean towel and wash rage and showed me the bathroom and said she would find me a pair of her husbands sweat pants to where. I stood in the shower and began soaping up the hot water felt so good. I suddenly felt a sudden throb in my cock a it began to stand strait up and got so stiff and hard I thought it was going to break off. The Viagra were working and I knew her husband had not been telling the truth. I got so fucking horny I began jacking off trying to get it to go down but the moor I jacked off the harder it seemed to get. I quickly dried of and looked on the floor where I left my clothes but they were gone she must have stepped in and got them to put in the washing machine. I hope she didn't see me jacking off I thought . I wrapped a towel around my waist and looked out the bathroom door. I did not see her anywhere so I ran into the bedroom by the bathroom, just as I got and closed the door she stepped in. we both froze as she looked down and noticed my hard on making a tent in the towel. She had a pair of sweat pants in her hand but dropped theme and said I thought you where still in the bathroom. I turned around to hide my hard on but she got up behind me and reached around and grabbed my cock. I didn't know what to do so I just stood there as she began stroking it up and down. It felt so good I began humping her hand, she walked around in front of me and pulled off the towel. And when she got down on her knees I told her to stop and tried to turn away but she quickly began sucking on my cock like a mad woman. Jill pleas stop this is crazy you're my sister I told her. She stopped sucking on my cock but never let it go she looked up at me and said pleas don't make me stop I saw you in the shower and it made me so horny . Its my fault you're like this I give you the pills and you took them for me to help me, pleas I wont tell anyone. she stood up and pulled her top off letting her big beautiful breast show her nipples were the biggest I had ever seen and sticking out like a baby bottles nipples. Then she pulled off the skirt she had on showing her pretty pussy with a small strip of black hair on top. Don't you think i am pretty she asked? its not that we are brother and sister its wrong we should not have gone this far even I said. Pleas Seth I need you and you need some relief pleas, pleas she begged me. She lay down on the bed and spread her legs showing me her pussy and she began twisting on her clit. It was so swollen it was sticking out from her being so horny and her pussy lips were the thickest I had ever seen. She began rubbing on her clit and humping her hand saying pleas little brother help me. That was more than I could stand she had the prettiest pussy I ever saw so I got between her legs and began sucking her clit and chewed on it with my teeth. She bucked her hips up at me and let out a scream saying fuck me Seth fuck your sisters pussy please Seth please. my cock was harder than ever before and I didn't know if it was the Viagra or knowing I was going to fuck my sister. I got between her legs and grabbed my cock and rubbed the head thru her wet slit and pushed the tip in watching her pussy lips stretch around it. She raised up on her elbows so she could watch. She looked at me saying oh my god I got my brothers cock in me and it feels so fucking good. She began talking nasty asking me do that feel good little brother, does your sister hot pussy feel good does it. yes its the tightest pussy I have ever fucked and pushed in her more making her screem loudly. Oh my god your cock is so fucking big I have never been so full fuck me baby fuck your sister good. I pulled back some and pushed in her hard shoving in her all the way and held it there for a second. She let out a loud moan and said your making me come your making your sister come and I felt a hot blast hit my cock head. I pulled out of her and her pussy gushed hot come everywhere. I had never seen a woman squirt like that before her pussy was soaking wet as I pushed my cock deep into her again and began slamming into hard and fast. she bucked at me meeting me as I pushed in she pushed up and every time we met it made a loud smacking sound. OOOH'' Yes, do it fuck me fuck your sister fuck me with that monster cock brother'. Know I don't lick to brag but I have a nine and a half inch cock and its three inches around and I was slamming it all in my own sisters pussy. Jill was going crazy bucking and slinging her head around saying your going to make me fucking come again you mother fucker is that what you want is it say it say it. Yes that's what I want I want to make my sister come and with that I felt another hot blast of her come hit my cock head. AAAAHHH SSHIIT your making me coooommmm' and I quickly pulled out of her letting her hot come blast my stomach and run down and drip off my nut sack. She pushed me backward and grabbed my arm and threw me on the bed. Now its my turn she said as she got on top of me and pushed herself onto my cock. She began jerking her hips back and forth and said tell me you like your sister fucking you, do you do you. Yes ride it sis ride your brothers cock fuck me sis oh you feel so fucking good. Do you want to shoot your sisters pussy full of come do you. I am going to ride your big cock until you shoot come in my pussy brother, and then she started raising up until my cock was almost out and then slamming down hard. I grabbed hold of the bed post and closed my eyes letting my sister ride me like I have never been rode before. She must have slammed her pussy down on me a thousand times until I felt my nuts swelling up to come. She said oh my god your cock is getting thicker is your sisters pussy going to make you come is it huh. Ride me baby your going to make me fucking come your going to -- - ahhahh shit im comeing and I blasted load after load into her pussy as she forced herself down on me hard. We looked at each other and began laughing. I stayed with her for a week and we fucked allot.