tickling fights always end in fucking

I had always fancied my fiances s****r from the 1st moment i had laid eyes on her. After months of harmless flirting over msn chat things started to heat up after a conversation about silk pyjamas, so arranged for her to stay the night, with my fiance working the next day i knew we would be left alone. I awoke at 9am to an empty bed and the sounds of someone washing up in the kitchen, i waited and just as i was begining to lose hope the door opened and there she was, standing in the doorway in light blue silk pyjamas. She made a joke about me being lazy but skipped over to the bed and got in next to me. I already knew how ticklish she was and started fooling around tickling her sides. As she thrashed around in my bed her firm young tits kept peeking out the top of her silk top but never quite enough to give anything away. Eventually we both collapsed panting on the bed with my arm around her shoulders, as we lay there i started lazily running my finger tips over her stomach and i heard a little groan escape her. I hear her whisper "you have really soft fingers" followed by a little giggle. As she said this she started rubbing my cock through the duvet not wanting to blow it i slowly run my fingers up her chest in small circles, running up her chest to the swell of her breasts as my finger brushed her taught nipple she let out a little groan. With my other hand i moved her hand that was stroking me under the sheet and onto my hard dick where she started to rhythmically mover her hand up and down, it was obvious she was inexperienced. i moved my hand away from her breasts and moved down to the elastic waistband of her silk pyjama bottoms, slowly teasing my fingers under the waistline. Slowly i moved further down expecting to feel her panties but was met with her coarse springy hair of her pussy. I could feel her she had such a tight neat pussy and ran my index finger through her coarse bush down into her slippery cleft. Her body bucked as my hand brushed that most sensitive part of her and was mirrored in eagerness as her movements on my cock intensified. I had to taste that sweet 18yr old pussy so moved my body so i was leaning on my side bent forward and kissed her on the hip, her eyes were closed as i ran my tongue over her stomach and gently parted her dark coarse hair with my tongue. Her clit was so swollen it was protruding from her wet lips like a little pink cherry. I took it into my mouth and gave a gentle suck, she grabbed the back of my head and pushed my face into her pussy. My lips slick with her wetness i moved back up and kissed her on the lips, when she didn't respond i pulled back and looked her in the eye. She stared for a few seconds and said "we cant do this". But after all this build up i didnt want to take no for an answer, so i slowly started rubbing her pussy again, her will soon dissolved and she kissed me hard on the lips. I could feel my cock rubbing against the lips of her soaking cleft. She reached down and with a firm hand grabbed my cock and pulled it into the tight opening. She was so wet but for some reason it wasnt easy penetrating her because she was so tight, i kept pushing slowly and felt the head of my cock enter her. She gasped. As i slid my whole length inside her she opened her eyes and told me "please just dont cum inside me" "Are you not on birth control"? i asked. She didnt have a chance to answer as i started sliding my cock in and out of her, she was so tight i knew i wouldnt last long inside of her. My speed increased, i could hear her pussy squelch as i pounded, i ran my hand back over her firm arse cheeks and felt my rock hard cock moving in and out of her, her wetness had leaked over her virgin arsehole and started soaking the sheets. The tightness in my groin started to intensify as my thrusts became faster still and i started to pant and let out a few little groans myself. "cum on my stomach" she panted. "I want to come inside you" i said, "i want to feel my cock explode inside your pussy". "please no" she said. But it was too late. I gave one more powerful thrust into her young body and i felt my cum squirt out of me. "Oh god no, i can feel you cumming inside me" she wailed. I slowly pulled out of her and following my cock out spilled a huge load of sticky white cum which slowly run down between her arse cheeks into her little arsehole. She chuckled "Actually that did feel pretty good, your the 1st man to ever cum inside me, it feels so warm". I could still see the little muscles in her pussy contracting as her orgasm ebbed away. After a shower and a coffee the adventures continued, but that is another story.