I grabbed her legs, lifting them onto my shoulder and I supported my weight onto my knees. I started slamming into her, with no warning, and I felt he... gasp as her pussy tried grabbing onto my cock tighter. She was cumming already; her juices were now flowing down her bum onto the mattress. I decided that I was going to keep going and just fucked harder and faster, her hand was now on her clit and I felt Jayne’s hand grabbing my balls. This was so hot; here I was fucking my girlfriend’s. You might have met my twin s1ster Goldilocks - yeah the one that fucks bears - in an earlier story. We're not actually identical - she has much nicer tits, but Dad finds it hard to tell us apart from the waist down. We found this out when playing the brass-bed-knob-up-the-cunt racing game, when he stood behind Goldilocks, thinking he was stroking my arse.Mum left when we were tiny. Everyone used to think of Goldilocks as the nice, clean-minded innocent ch1ld; not realising that the cuntal. As I got closer Sandy took her leg off of the desk and turned away from me and then bent over so I could see her glistening pussy waiting for me to plow into it. Each time I got closer I she would move away and pose in another way to make her body look even sexier then it did before. After finally getting my pants off and boxers on the floor and standing naked in my office, I went over and shut and locked the door. Just in case. Then it because a friendly game of chase. Around and around the. I started to push harder and she squeezed her eyes and said that it hurt and I told her I should feel good.After several pushes I was deep inside of my sister. Her warm tight pussy was hugging on to my cock really good. I may not have known what I was doing, but I remember taking it slow. I remember her breathing getting heavier and heavier as I slowly pumped my cock in and out of my sister. It was a nice surprise when I felt her legs wrap around me and pushed me harder into her. Suddenly it.