My Girl

I was 18 and Amy my sister was 16 and we had always been naturalist in the family when my father past away after being ill for some time and our step mother left so I looked after Amy till she was 18. Both me and Amy moved to London, England in a two bedroomed flat and when we was alone or it was late we both went naked but nothing sexual was in it and we even showered together but one day Any asked me if she was good looking or sexy so I said definatly yes, why I asked and she said she had never had a real boyfriend and she was still a virgin. After this she went to shower and I was thinking and very surprised and when she got out I couldn't help but notice she had shaved her pussy but I didn't say anything and then we started to turn everything off for bed but I saw she was shaking and very cold and asked if she was ok. She replied can I stay in your bed till I warm up so I said that's ok since we done this many times before. With my arm around her trying to warm her up and her head on my chest we both fell asleep. It was about 3am when I woke up and felt a soft warm rubbing on my leg and Amy thinking I was asleep was softly grinding her pussy on me with one leg over me so I let her carry on. My dick was getting quite hard by then so with my other arm I put it to her hip and down to her bum wherei pulled her harder on to me when she looked up and saw me looking at her. Sorry she said, No its ok I like it and it feels like you do to because your pussy is so wet and pulled her again onto me. With this she straddled me while grinding on my dick and leaning over me we kissed full French style while I cupped her B cup tits and rubbing her nipples and I could see her nipples swollen she was turned on. We cant have full sex she says but we can make each other cun and she carried on grinding on me till I lay her on the bed and started sucking her nipples and kissing down her body till I reached her pussy. I could tast her wetness and hear her moan as she reached orgasm and she cum and it was so good I wanted more and her tast made be go mad with exitment. Your a virgin as asked and yes she replied and with that I pushed my dick in her pussy , Oh she said in slight discomfort and she said, what are you doing, Its ok just relax and enjoy it and it will start to feel better. All the time we was kissing and no hold barred sex and for 3 years now we have lived together as a couple ib a 1 bedroomed flat and Amy is now expecting our first child and according to all the scans it looks good and its a girl.Iv changed my name now so to strangers everything looks ok and we carry on as a couple and dont evan mention about us being siblings.