"Stand up and tell me if it feels better," Chris said, startling me out of my reverie. I wanted to continue daydreaming, and I wanted him to continue massaging my calf because it felt so amazing. I stood up and took a few exploratory steps. The pain was totally gone. I was even able to jump up and down without pain.  I have to admit, I was impressed.

"Hey, go easy on that leg! You pulled a muscle, now you need to stay off it. No more running, not for another couple of days."

"So what? If I get injured, you can just fix me again," I teased.

"You're a brat. And you sound like half the bone-headed guys I have to take care of."

I gave him a playful slap, which I LOVED doing because it gave me an excuse to feel his hard body.  Part of me felt like it was kind of weird to feel a sort of attraction to him, because he was my family.  But it wasn't like were related or anything.  He was just my stepbrother.  I guess maybe it was my pathetic attempt to flirt with him a bit, and maybe he picked up on it and maybe he didn't.  And if he did take my teasing as flirting, well, what was the big deal? It's not like we were actually going to have sex or anything.  Truth be told I was still a virgin, and if my first time was with Chris, well, that would be really crazy.  And if we did...no, I'm just being stupid now, it would never happen.  Well...what if we did?   We weren't related by blood, so would it really matter?  I was conflicted, to say the least.

Finished with my therapy, I went up to my room to get ready for bed. I was stinky from my evening run and needed a shower. I pulled off my shorts and kicked them into the room somewhere.

But the shower would have to wait.

It wasn't worth fighting my feelings. I was more than simply horny, it felt like my entire body was vibrating, like it was charged with electricity. I needed to masturbate.  I got into my bed, closed my eyes and spread my legs.  My panties were damp, and it was clear that what I felt for Chris wasn't imaginary: I was dripping wet and ready for Chris to grab me, throw me against a wall, and forcefully take my innocence. I eased out of my shirt and sports bra. My nipples were erect, so hard they looked like they wanted to burst. God I was horny! I ran a hand over my nipples, enjoying the pleasure that bloomed through my body. I was so sensitive, I could cum sometimes just by touching my nipples.

I felt my panties again. They were so soaked that when I pulled my fingers away, a glistening string of my lust was left coating them. My wet pussy was so ready for him. I slowly massaged my wet sex through my panties, easing more and more pleasure from my aching cunt.

I worked a finger into my slickness and let out a gasp. I imagined the finger was Chris's, and that we were laying on the couch together. I fantasized that we had sat down to watch a movie, and we had both gotten horny together. Now he was fingering me, violating his little stepsister and sending wave after wave of ecstasy over my body. The pleasure was too much, and I involuntarily let out a moan. I was so ready for him. I worked my fingers slowly along the hood of my clit, coaxing it out of its hiding place. I gasped audibly when I touched the little button. I imagined it was Chris's mouth, not my fingers, running all over my clit, coaxing more and more wetness out of me. I wanted to hook his big shoulders with my legs and smear his face with my sensual juices, marking him with my lust, making him so horny that he couldn't help it, couldn't help wanting to fuck the brains out of me. Then I wanted him to grab me roughly and pull me back, force my legs open so he could pummel me with reckless abandon.

I imagined his cock buried in my wet mound, all the way up to the hilt, and my body tense with pleasure and ecstasy as he plunged in and out. I imagined that his cock was thick, almost too thick, and that it made my pussy groan with pleasure as he stretched it to its limit, fucking me hard. I took two fingers and roughly penetrated myself. Another soft moan escaped my lips. I rolled over and buried my face in the pillow, so I could moan as loud as I wanted. I found my secret spot and worked two fingers against it, rubbing my clit at the same time. I was so close. I inched closer and closer to the edge. Then I came, convulsing as my orgasm wrung every drop of pleasure from my body. I cried out softly into the pillow, surrendering to wave after wave of ecstasy.

It felt so wrong to feel this way. All of it. And that's why it was so delicious. I had been secretly fantasizing about him since high school. If Chris had been my actual brother I would never have felt this way. I didn't want to keep resisting his alluring grin, his knowing dark brown eyes with their devious twinkle, or the hard muscles that rippled under his shirt every time he moved. It only took a smile or one of his stupid jokes, and my body started aching for him.  I simply couldn't help it; thinking about any other guy wouldn't deliver me to the same place.

I wanted more. I dipped my fingers into my mouth, tasting the flavor of my own wantonness. I loved being nasty. It was so strange, because I was outwardly such a good, quiet girl. I touched my clit again, working my little pearl until I was ready to explode again. It was amazing how fast it could happen; lately, I had been able to cum two, even three times in a row. I fucked myself with my fingers as I imagined Chris grabbing my ass and pounding me from behind.

I reached my climax even sooner than I expected. My body convulsed for a second time as I came once more, again silencing my ecstasy with the pillow.

God, there was even a damp spot on the bed! How could I be this sexual?! I sunk my dirty body into the sheets, drifting in the afterglow of my release.

                                                 *****

I rolled groggily out of bed the next day. I never did shower the night before.  I smelled and felt like sweat, pussy and funk. Truth be told, I was still fighting the sleep deprivation I had amassed during finals week. I stumbled into the shower and washed the grime and tiredness off me.

I dressed and headed downstairs, toweling off my hair. Chris was sitting in the kitchen eating cereal and reading one of his science books. Whenever he wore his glasses, he looked like some kind of nerdy hunk, as if he were the mild-mannered alter-ego of a superhero. The look had driven me up-the-walls crazy ever since I was sixteen (yeah, I'm in to nerdy guys, too).

He looked like he was really engrossed in his book. He looked up at me for a second.

"Hey, sis."

"Hey." I opened the refrigerator. It was pretty bare, we needed to do some grocery shopping soon. I made a bowl of cereal and joined him at the table.

"When are mom and dad coming back from Cabo," I asked, trying to get him to talk to me.

"I don't know. They're supposed to call from the hotel pretty soon to let us know when to pick them up from the airport."

"Oh, ok."

God he was hot!  And I'm so pathetic...I just wanted him to fill me with his seed.

I finished my cereal and walked back upstairs to my room. I took off my sweats and pulled on my jogging shorts. I was going to get him this time. I twirled in front of the mirror, checking myself out. I felt my breasts: perky B cups which looked plump even when they were smashed under a sports bra. But I was feeling crazy today—who needed a sports bra? I tugged it off and put a white t-shirt on over my bare breasts. I jumped up and down and watched them bounce around. Maybe not the best choice for running, but I was sure they would get Chris's attention. I smacked my ass playfully, then felt a little awkward. I had a hard time admitting that I looked good. Sure, I was still his nerdy kid sister, but who could say 'no' to this body? All those other girls were getting fat in college, and I was in better shape than I had ever been in. I determined I was going to seduce him, before my lust made me lose my mind. I didn't care if his massive horse cock had supposedly serviced the entire varsity cheerleading squad, or if he had used ancient dick-knowledge from the Kama Sutra to bring every dumb sorority slut to new heights of sexual pleasure. I wanted him, and I was going to make it hard for him to say no.