My sister the sexiest girl in town according to the vibes going around. Everyday when she comes home from school..She is 17..She is proud of her beautiful body after she gets into her normal gear. Those inner thighs are moulded perfectly onto her mound and hips and for a 17 year old she has a pair of tits that even mum commented on saying you really must be driving the guys crazy flashing those huge buns.The thing I always notice is that her lips sort of gave the game away. They were always kind of half open as if a lollipop would just about roll around her tongue and give one the impression that she was or had the tendendency to make a good cock sucker. I never asked her about or if she was involved with someone sexually as being by younger sister and of a sexual age what she did was her business.However being from a home where sex is discussed openly with other family members...advances are not made for incest relationships. I kept my distance, except that when I wanted a hard on to masturbate, the easiest for me was to go to my sexy sisters room and pretending to kick up a conversation, my imagination would drift and because she always use to be an exibitionist in the privacy of her room, I could virtually get a glimpse of every angle of her volumptious body. I would then excuse myself from her room and jack myself off in the bathroom.It wasn't long before I got myself in a very embarassing position, where after I had my usual visits to her bedroom, she one day enquired as to why I move on from her room to the bathroom and what do I do in the bathroom which I do not tell her about. I tried to evade the subject, but she casually told me that she had seen me playing with my cock and frantically calling out her name when I shot my load. If that was an issue she remarked "then why don't you just let me suck it off for you?". I was totally taken a back not realizing that what she was saying made my cock stand up like a pole."Don't you ever notice my lips?. They are always ready for sucking and don't you sometimes notice dried semen on them?".I am a lover of cum draining out at school about two to three cocks a day as I am so highly sexed, I rather go that route then to risk getting pregnant. I also open up my ass to some of the guys so I am well prepared for ass fucking as well,but I think I am not going to risk getting pregnant by having my pussy fucked." Without further comments she reached down towards my hardened manhood, ripped it out and was shocked out her mind. She had never ever seen a cock almost 10 inches long and as thick as if it would not fit in her mouth.Instantly she went stone cold as she did not know what to say. "I have sucked them, all shapes but this is something I haven' t prepared myself for. The biggest I ever had was about 6 inches, but you have a monster of a cock. You will have to teach me deepthroating and what better place than right here in our house and with my brother!". As she slowly started to take the head into her mouth, it was like her having to stretch her lips apart and as I pushed gently deeper in she only managed about 5 inches before she pulled out and grasped for air. This sister of mine I realized was a bitch that never gave up and once again she got her mouth over my cock but this time she kept her mouth open and tricked me into getting my cock further down her throat. I managed about 6 inches before she retracted again. We went on like this for 15 minutes and the furthest she could take it into her throat was 6 inches. Not to be undone she explained that before we change position, she knows that because her ass was fucked plenty times and a longer cock would be able to penetrate her, she ripped off her panties, turned around flat on her stomach and grabbing a handful of baby oil, made me lube here ass deep inside.I then proceeded to penetrate her ass hole and to my amazement 10 inches full was inside her. She screamed out in pain, but asked me to pound her as this was the only way to open her hole up fully. I hammered my cock deep into my sisters ass and at one point (no fault of mine) my cock slipped out and on trying to push it back into her ass she wiggled and guess what I pushed my cock into her cunt. She screamed No! No! you have taken my virgin but what the hell just fuck me but dont release your load in me. I fucked my sister doggy style and than we both turned around and as she lowered herself towards the end of the bed, I just hammered my huge cock into her puss. Here was I fucking the shit out of my sisters pussy just by chance and we were enjoying like it was the greatest sensation we were experiencing and than I felt her shuddering and at the same time my balls swelled up, I shot a first stream...too late to withdraw, without her realizing, right into her cunt and she screamed about something hot entering her. Than I retracted and shot the balance of my load onto here face, lips and tits. She was soaking as my load was almost a half a cupful and the most she had ever previously taken was about a tablespoon full.After we had tidied up she suddenly asked if the feeling of "hotness" she felt going into her cunt was normal for a first fuck and I replied " just relax, it's my cum that I shot in you, but hopefully just have confidence that you are not pregnated. I sort of also felt some anxiety, but this fuck was one of the most most unique I had. Firstly my sister could not suck my cock as it just would'nt fit properly, secondly she had a ass fuck where for the first time a full 10 inch penetration and lastly, because of her wiggling away, she had her virgin taken by her brother and thereafter the most unbelievable fuck she ever had.Now for the next unfinished business. The ability to teach her to have a deepthoat with a ten inch cock so we just lay low for a hour or so before I re-entered her bedroom. She said she was sore all over, but it was fantastic and she hoped that the birth control pill she started using recently works out well for her, but we will see when of if we come to that (pregnancy).Normally after I shoot a heavy load, my cock starts swelling again after about an hour and now was the time.The only thing and I mentioned it to my sister is that this is going to be a long session as my cum will take some time to shoot. I warned her that I may tear her throat apart but she was adament and insisted she wanted a 10 inch and then swallow whatever flows thereafter. We started of by going the normal blowjob route that is she on her knees and my cock flowing into her mouth. Once again more than maybe 6 inches of penetration was not possible as due to the thickness of my shaft. I had by now grown so erect that it was actually frightening thinking to injure my sister. We went around where I straddled her from the top and she at the bottom almost as if in a 69 position. I gradually lowered my shaft into her open mouth, but as soon as I went in a bit too deep she screamed for air so I had to retract again. I then laid flat on my back and from the side she started licking and sucking and when I looked down on what she was doing I was surprised to see that the entire lenght of my cock was longer than the distance from her chin to the top of her forehead. What this fucking bitch sister of mine was trying made me think. However whatever she was doing was creating a sensation relating to cock sucking which was not easy to describe. We than moved around and putting a pillow under her head, I moved just over her huge tits to start in earnest face fucking. This she seem to enjoy more and within a few minutes my penetration had now increased to about 8 inches. She throughly enjoyed this but because of my having already a cum a delay in my second cum made things more enjoyable. Then it finally hit me and that is how to deepthroat this bitch sister of mine who gave me exquisite enjoyment. I lowered myself off the bed, got her in a position of laying on her back on the bed, but letting here neck hang down over the edge. That did the trick as I then held my 10 inch over her mouth, told her to relax her neck and tilted it backwards. I then proceeded with the the pump action. I did'nt believe in when I realised that I was pushing a full 10 inches down her throat with my balls touching her forehead every time I pushed in. We developed a rhythym whereby when I pulled out she breathed and when I pushed in her throat absorbed my shaft with ease. The culmination came when I was ready to give her a mouthfull and because of a possibility of gagging I pulled back towards her mouth shot streams of load, went a little deeper, made her swallow, pulled back and shot more streams and eventualy my sister could not take everything in as my load was too much and very thick so the rest just dribbled out from the side of her enclosed lips. We just collapsed into bed and kissed and thanked one another for the great encounter we just experienced.
P.S As mum is only 37 my sis told me she is going to tell mum and setup a session for me and mum, as unbeknown to me mum loves fucking as well and was always curious as to what was the size my cock and will I be able to screw her the way she wanted to be screwed as she is also crazy about giant cocks.

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