She was his sister!Sure, the taboo nature of it all was quite the turn-on, stepsister or blood sister. The combination of her silky blonde hair, the u...turned nose and her bedroom eyes were his Achilles heels.Starting way back, when she was 10 to his 15, she would follow him around all the time. Most brothers would call that 'being annoyed, ' but whenever he noticed her, noticing him ... she would flash those perfect teeth, and her face would light up in anticipation of his asking her. Her nips were hard and poking at her soft pj top. She reached over and unbuttoned my shorts; then she unzipped my fly. Soon my shorts and boxers were being slowly pulled down to my knees. She must have been terrified that I'd wake up! There. My cock and hairy balls were fully exposed to my younger sister. She knelt there for a full minute watching it as it pulsed with the beat of my heart. Her breathing became more urgent as she reached over and grasped it in her delicate hand. She didn't jerk. Kate has a box from Flat Pak and needs your help to put it together” she added “You need to take some tools “ Strange I thought Flat Pak always supply the keys etc After supper I went to the Garage and sorted out a couple of screwdrivers a hammer a small set of molegrips and pliers I put them in a small tool box and went to see Kate. She told me the Box was in the hall. It was huge ‘WTF is it I thought’ Kate said its a wardrobe and it’s heavy. “Where is it going” I asked “I need to. 'OH SHIT, WILLIAM,' I cried as I gripped the sheets in my fist. Gasping for breath I uttered 'easy...take it easy...you're too damn big...' William slowly pressed forward till his huge head popped into my anus, gasping in pain I felt my anal sphincter muscle ring snap shut around the neck of his man hood and heard William moan '...damn your ass is tight...shit I don't remember pussy being as good as this.' Williams huge penile head was lodged just inside my outer sphincter muscle ring and.