My Step-s****r - Part One

“Please don’t tell my mum,” Pleaded Emily, my step-s****r, grabbing my hand and looking up at me with that puppy-dog look. I could see tears beginning to well up in her eyes. “She’ll kill me.” She added softly. “I don’t know, Em,” I said, looking away. “I’m supposed to be making sure everything is okay while they’re away…I’m the one who’ll get it in the neck if they find out!” She stepped away, leaving go of my hand and sitting down on the couch. She is 17, with long blonde hair, and is kind of pretty, in a way. She’s quite short and a little overweight, but has a fantastic pair of boobs and her milky-white, curvy body is very sexy. Especially in that short white skirt and red boob-tube. “Please,” she said, looking down at the floor. “I’ll do anything…” “Anything?” I asked, stepping in front of her, one eyebrow raised. “Anything.” She smiled, placing her hands on the outside of my knees. “Okay,” I said, unfastening my jeans and letting them slide down my legs. “Are you any good at sucking cock?” “Let’s find out,” she replied, pulling down my pants to reveal my slowly swelling length. I shuffled forwards slightly and she quickly grabbed me around the shaft with her chubby little fingers and began slowly wanking me. “Wow,” she gasped as my cock began to harden in her soft hand. “It’s big.” I just smiled down at her. Pretty soon I was rock hard and she was slowly pumping away. Her hand felt so soft and smooth, and looked so cute with nail varnish on short nails. I watched her as she worked me, her eyes transfixed on my hard cock as she slowly tugged it. I saw her lick her full, juicy lips and then open her mouth, her tongue resting on her bottom teeth as she moved her head forward. I closed my eyes as I felt the silky heat of her mouth close around my cock. She took most of it in her first stroke. I felt the tip touch the back of her neck and she gagged slightly, but didn’t pull away. Instead, she reached both arms around me and grabbed my arse with her hands, pulling me forward and driving my stiff cock down her throat. “Uhhh!” I sighed as her throat constricted on my cock, and I couldn’t resist grabbing the back of her head and clamping it in place for a couple of seconds, stopping her from pulling away. When I let go, she rocked back, letting my cock slip from her mouth and gasping in a massive lungful of air. Her eyes were watering, but she smiled and immediately took me in her mouth again, working me around with her tongue. “You’ve done this before.“ I said, brushing some hair from her face with my finger. This time it was her turn to just smile. Pretty soon she was in full swing, repeatedly forcing my cock down her throat and out again, making some strange gurgling noises as she took every inch, and gaining speed. She occasionally stopped to catch her breath, pulling me out and tugging me furiously as she did. It felt so good, I knew I wouldn’t last much longer. She must have known, because as she pulled me out of her mouth she cupped my balls in one hand, looked up at me and said, “I want to taste your cum.” I felt my balls begin to tingle immediately at the thought of cumming in her mouth, and I reached forward with both hands, gently holding the side of her head to keep it in place as I pushed my cock back towards her open mouth. This time, as she took my length in her throat, I clamped my hands more firmly on the sides of her head, stopping her from moving, and slowly pushed my cock forward. Looking down, with my cock filling her neck, I saw she was looking back up at me, tears welling in her bulging eyes. Both of her hands were gripping the backs of my legs very tightly. I pulled half-out, still holding her head. “You alright?” I asked. “Uh-huh.” She managed, through a mouthful of cock. “Okay.” I said, and started to fuck her throat. With slow, steady strokes I pushed myself into her tight neck, each thrust creating a sloppy gurgle as it f***ed it way in. I stopped every now and then, pulling out to let her breathe, but each time I pushed back inside I started fucking a little harder. After only a few minutes of this, I couldn’t hold back any longer. She was moaning and gurgling at the same time, and I just had to blast my cum at her. Pulling out, but leaving my glistening head centimetres from her lips, I grabbed my cock and started wanking hard. Looking down, I saw that one of her hands had wandered up the front of her skirt and was jammed between her chubby thighs, fingering her pussy as she sat on the edge of the couch, her massive boobs heaving as she struggled to catch her breath. She was looking up at me, her eyes bl**dshot and watering, her lovely mouth open as she moaned, breathing hard. I felt the pressure building, and just managed a strangled moan before I let go, squirting a jet of hot, thick spunk straight into her waiting mouth. She rocked back slightly, surprised by the f***e of it, but not closing her mouth. I kept pumping hard and shot another burst, which hit the side of her mouth and sprayed up across her cheek. She giggled, closing her eyes as my third squirt, less powerful than the first two, hit her chin and sprayed up across her lips and nose. The last few squirts were pointless, dribbling off her chin and neck and into her ample cleavage. When she saw it was safe to open her eyes, she reached forward, with my cum coating most of the bottom of her face, and took my slackening cock in her mouth again, sucking the last of the spunk from it. When she finished, she smiled up at me. “My turn now, I think.” She said...