My girlfriend, Trisha, and I had been dating for well over a year, when her mother invited me to move in with them for the summer to attend classes at the local college. There is no way I could have afforded the dormitory costs and tuition fees otherwise, so I jumped at the chance. And of course it meant that I got to spend each and every night in my girlfriend's bed!
My girlfriend and I are both in our mid-twenties and are madly in love. We first met in a class we had together but were seeing other people at the time. By the end of the semester, however, we had both broken up with our significant others and were hot and heavy for each other. She is about five foot two and petite, but with a fantastic set of 36c breasts and a body to match. Sex with her is always amazing, and I love the feel of her legs wrapping around me as I drive into her tight pussy. She is almost always game for trying new things. The only problem arises from the fact that I have a much higher sex drive than her. She's satisfied to have sex at least once a week but I need it much more! I have to masturbate at least once a day or I'd go crazy. My girlfriend does give me the much appreciated hand job fairly often even if she doesn't want the sex, so I'm not complaining.
Her parents are long divorced and she lives in a nice house with her mother, little brother, and younger sister, Sonia. Sonia was every bit as hot as her sister. She had long jet black hair that reached to just above her waist. She was always incredibly tan and had these long smooth legs that just went on. Her breasts, while not as big as her sister's, still were perfectly round and full for an 18 year old. I masturbated many times with visions of Sonia doing various things to my cock, making me cum like a fountain all over her body. But I never really gave Sonia much thought in that regard other than as a jerk off fantasy, and I certainly never thought of her in reality as anything other than my girlfriend's sister.
About a week after moving in, I was already immersed in my studies, spending much of my time in our bedroom in the basement. Her mother worked during the day, and her brother was always over at some friend's house, so it was usually just me and the two sisters in the house most of the day. Today, Trisha had to go into work at the mall.
"Are you going to be okay without me for awhile?" my girlfriend teased, coming downstairs into the bedroom, wrapped in her robe after getting a shower.
"I'll be just fine, thank you," I replied, intently staring at the small gap in the robe that was displaying a generous amount of cleavage. I was never one for subtlety. Trisha had no doubt as to what was going through my head, and took the opportunity to tease me a little further. She slowly undid the tie at her waist, but didn't remove or even really open the robe much. Now I was treated to a generous strip of flesh that traveled from her neck, through her cleavage, showing the swells of her breasts on the sides, across her stomach and between her thighs; I could see the dark patch of pubic hair between her legs, and the sight brought me to an instant erection.
"Down boy," she laughed, removing her robe entirely. "I have to go to work right now. However," she continued, walking slowly across the room toward me, causing her tits to bounce slightly with each step. Her pink nipples were clearly hard, though whether from desire, or the fact that her body was still slightly damp from the shower, I didn"t know. Nor really cared! "When I come home, we can play if you'd like." With that she straddled across my lap, grinding her crotch against my cock. Confined in loose mesh shorts, it ached to be set loose, straining for her heat. Trisha kissed me fully, her tongue sliding into my mouth, and I gripped her firm ass cheeks in either hand, forcing her against me even harder. She laughed again, before standing up. "I promise to make it up to you, "she giggled. Now it was her turn to stare as she noticed the tent in my shorts, giggling even more.
"You better," I smiled, adjusting my hard on to a more comfortable position. It took Trisha only a few minutes to get dressed and be on her way, leaving me alone with my erection. I sighed, closed my books, and walked over to the bed. There was no way I could concentrate now. I took off my shirt and shorts and laid down, all ready to masturbate. I had only gotten in a few strokes before I decided to save it for later that night when she came home. Now what to do until then? Having already decided to forgo the studying, I thought maybe I could distract myself with a movie. I put on a pair of underwear, then the shorts, but skipped the shirt before heading upstairs to the living room. At least the briefs were keeping my cock from sticking out like a poker and it was easier to move.
After searching for a few minutes through the various movies accumulated by the television, I couldn't get the thought of my girlfriend grinding against my body out of my head. "Maybe Sonia wants to watch a movie. She can pick one" I thought. I did a quick check of my cock to make sure it wouldn t be as noticeable to Sonia before heading up the flight of stairs. Her room was the first door off the second floor landing, with the bathroom on the one side and her brother's on the other.
She and I got along great, but our paths never usually crossed during te day, as I was always downstairs studying and she was always upstairs in her room. When I stepped onto the landing, I could see Sonia's door mostly open with a light on. I gently rapped my knuckles on the door before pushing it open and walking into the room. "Hey Sonia," I started before I realized she was trying frantically to snuff out a cigarette and flip it out the open window before I noticed.
"Busted!" I grinned, folding my arms across my chest. She was wearing her tight jean shorts that were low cut, and a simple black tank top. She was sitting on the window seat with one leg tucked underneath her, a perfect position to try to sneak a smoke when she thought no one was around. "Next time, try locking the door," I teased.
But Sonia was clearly made nervous by the fact that I had caught her. "Please don't tell my mom! Please!," she pleaded.
Now I felt bad. While I didn t think smoking to be all that smart a habit, I certainly wasn"t going to give her a lecture and I definitely wasn"t going to turn her in. Before I could reassure her, she kept going with her pleas.
"Mom'll kill me if she knew! Please!" She was practically crying now. "I'll do anything! Please don't tell!" As soon as I heard her say "anything", a flood of my fantasies of Sonia poured into my head. Of course, I knew that wasn't what she meant, but I couldn't help but wish! I could just picture the Penthouse-like fantasy of Sonia sucking my dick as I promised her I wouldn't tell a soul. Sonia, laying on her bed, as I licked her wet pussy, while she told me what a bad girl she'd been.
