It was in 2005 when our love affair began. My parentshad left me alone in the home for the night safe inthe knowledge that Casper would look after me.... Being a15 year old girl being left at home I was prettylimited as to what I could really do to entertainmyself. So I decided to take a bath and as alwaysCasper followed me in and sat next to the bath whilstI bathed. As I was washing myself my whole body seemedto become all tingly and as I started working on thetop of my legs I accidently brushed. Allen said, “Nothing really, just that you are a sex –machine.” I grinned, “I do my best.” Allen smiled. “Most of the time wives complain because their husband’s dicks are too small, but judging by that bulge," he looked down and pointed his chin at my crotch, “I wouldn’t say that’s the problem.” I let out a chuckle, “I’ve never had any complaints, but I wouldn’t say it’s that big.” Allen shifted his eyes back and forth between my crotch and my face. “Let me see it.” ‘So,' I thought, 'he. Finally I lowered the opening of my T-Shirt and had him a peek at my Cleavage, which I think turned him on. He stopped and I was excited. Took off my T-Shirt fully and untied by bra. He was fully clothed so I tried to take off his Shirt but he said its not time. He laid me down and started sucking and pressing my tits, occasionally coming up kissing me and smooching my neck. It was soooooooo good. I was really turned on and wanted sex immediately but I just don't wanted to stop him too because. This is my dream come true. "K-Katie..." I groan. She smirks and crashes her lips onto mine. It's a perfect fit. I slip the tip of my tongue into her mouth, running my hands feverishly along the small of her back. I'm overcome with emotions of pleasure, confusion and adrenaline. Making out with my sister in a small changing room is new. But I love it already. "Get down, bitch." Katie orders me, pulling her sweet lips away. I obey and rip her tights off. She's wearing no panties and I can see.