My Sister the Sex Addict (Family Chemistry Book 1)

by Richard Bissell

  I pulled her off, grabbing her hand to move it again.

  “What’s wrong?”

  “When you do that, at the end, you can’t just sit there. Use your tongue on the head, suck on it or something. Otherwise it’s harder to come.”

  “Okay.”

  She got me close again with her hand. This time, when she bent to catch my cum, she sucked on the head like a lollipop, massaging it with her lips and tongue. I groaned and spurted off into her mouth. As she always did, she worked on me until she had every drop.

  “Was that better?”

  I nodded weakly.

  “Would you like me to just use my mouth now? Instead of my hand? Would that work?”

  “Maybe.”

  “Because that lotion tastes nasty. I was thinking that if I just sucked you, I wouldn’t need the lotion. Can I try it that way tonight?”

  I nodded again, stifling the laughter, knowing that I was probably going to burn in Hell for this.

  Kim returned that night and went straight under the covers. I slipped off my pajama bottoms and felt her taking my dick in her mouth. But after sucking briefly on my hard-on, she settled into just moving up and down over me, doing nothing else. I stopped her.

  “What's wrong?”

  “If you're going to do it like this, you have to do more than that.”

  She didn't answer me right away.

  “What do you want me to do?”

  “Like you did this afternoon. Suck on it. Use your tongue. You have to generate some friction.”

  “Okay. I'll try.”

  She went back to work, this time working her mouth over me. I lay there, eyes closed, holding her head as she bobbed up and down, slurping on the head and spinning her tongue around.

  She stopped after a minute.

  “Is that better?”

  I grunted and pushed her back down. Another minute or two was enough to get me over the brink. When I came, I felt her slurping it up and swallowing as it came out. She sucked it all up and then went back to bed.

  The next afternoon, I was unable to resist taking advantage of her again.

  “Kim, you know, you’ve probably seen my porn videos, right?”

  “Yeah. What about them?”

  “When I do this, I’m used to seeing naked girls. I kind of miss that.”

  “Do you want to watch a video while I suck you?”

  “No. That would be kind of lame. I was hoping maybe you’d be willing to take off your clothes. Like we did yesterday.”

  She shivered nervously.

  “You mean completely? Everything?”

  “Yeah.”

  “You really need me to?”

  “It would help. And like I said, you’ve pretty much seen me naked already.”

  She struggled with herself for a few seconds before giving in. She pulled off her top and bra, and then slipped out of her jeans. She wore plain white bikini panties, and after hesitating a second, slid those off too. I looked her over for a few seconds. I had seen her tits yesterday, but I hadn’t seen her completely naked since we were kids. I saw she'd trimmed her blonde pubes down to a little landing strip. The plump cleft of her pussy was clearly visible, and her clit peeked out from inside.

  “Does that help?”

  “Yeah. Thanks.”

  She dropped to her knees and took my hard-on in her mouth. I had lost nearly all of my reservations about this pseudo-incestuous exercise a while ago, so I just stared down at my naked blonde stepsister as she sucked on my dick. I wanted to grab her tits as she worked on me, but that probably had to wait. I figured I would be able to talk her into it eventually, though.

  Her technique, designed as it was toward procuring my cum as quickly as possible, was nothing if not eager. She had taken the previous night's lesson to heart, and worked her lips and tongue around and around the head of my dick, constantly sucking hard. Her cheeks would hollow each time she rocked her head back, and I could reach down and feel her jaw working against me. A minute of this treatment was enough to give her a mouthful of cum.

  That night, when she climbed into my bed, I stopped her.

  “Can you take off your pajamas? Like you did today?”

  She got naked without protest this time, and I scooted back to lean against my headboard so she would be closer to me when she sucked me off. She went to work, and after about ten or twenty seconds, I reached slowly under her to take a tit in my hand.

  She stopped and jerked away from me.

  “What are you doing?”

  “I couldn’t help it. It will help me get off if I could do that, though.”

  “You mean, touch my tits?”

  “Right.”

  She pursed her lips.

  “Okay. I guess so.”

  She bent back down, and as she took me back into her mouth, I began playing with her little breasts. I rolled her nipples between my fingers, making them erect. I pushed her flat against her chest and massaged her slowly.

  The feel of her firm boobs as she slurped on my dick was too much. I squirted off in her mouth after less than a minute of it. When she was done sucking up the last few drops, she grabbed her pajamas and got dressed.

  “You know, I think they are getting bigger,” I said.

  “You think so? Could you tell?”

  “Yeah. Definitely.”

  “Cool. Thanks. Good night.”

  3.

  For the next week, Kim would get naked and let me play with her tits while she sucked me off. Something was going on with her breasts, even if (as I knew) it was had to be her natural growth (belated as it might be), and they were definitely getting bigger. Not big, necessarily, but big enough that she convinced Mom to buy her some A-cup bras to replace the AA-cup things she had been wearing up to now.

  Of course, this meant that she was even more determined to continue ingesting my sperm. Every day after school and every night after lights out she gulped down a load of my cum. One night, after getting her dose, she stayed in bed with me, though she had put her pajamas back on.

  “Jimmy?”

  “Hmm?”

  “Do you think we could do it three times a day? Like in the morning, too? Could you do it that much?”

  I groaned.

  “Why?”

  “Well, because even if this is working, it’s taking a while. I thought if I took even more, it would make things go faster.”

  “I don’t know about this.”

  “Could we try?”

  “How can we do it in the morning? Mom will be up.”

  “We could do it in the bathroom. When we took our showers.”

  Oh my, I thought. She had just given me an idea.

  “To go that much, I’d need more help from you.”

  “I’ll do whatever you need me to.”

  “If we started taking showers together, that would really help.”

  “You mean like . . . how?”

  “Washing each other, and all. That would be enough of a turn-on.”

  “Okay. If that’s what you need.”

  The next morning, after my alarm went off, Kim stuck her head through the door. I heard the shower running.

  “Are you ready?”

  I had some serious morning wood, so I figured I had better take advantage of it. When I got into the bathroom, Kim was already naked and testing the water in the shower. She stepped in, and I followed her.

  “What do you want to do?”

  “Just wash me, and I’ll wash you.”

  We soaped each other up from head to toe, and as Kim began stroking my slick cock, I couldn’t resist playing with her tits. She leaned closer to me, laying her head on my chest. I let one hand fall down between her legs and gingerly felt her wet pussy. She shivered against me, and her hand gripped my cock more tightly, but she didn’t stop me. I slipped a finger between her lips, finding her clit. I tweaked it gently. I pushed my middle finger in further, finding her cherry. She moaned when I touched her like that, squeezing my cock hard
and stroking even faster. I wanted more from her, but things were moving too fast.

  “I’m going to cum,” I moaned.

  Kim instantly dropped to her knees, swallowing my cock in one gulp. A second later I erupted into her mouth. She pumped out every last bit of it with her fist, then swallowed it down.

  When she was done, I leaned against the back wall of the shower as she washed her hair. I reached out to help her, and she dropped her hands to her side as I massaged her scalp.

  “That was nice,” she said a moment later.

  “Yeah.”

  That afternoon, I had a bit more trouble getting off, but Kim was able to do it. Cumming that night took even longer, but get me off she did.

  The next morning, she came in to wake me up even before my alarm went off. She flopped onto my bed on top of me, already naked, giggling, and pinned me down.

  “Come on. Wake up. Let’s go.”

  She sat back as I climbed out from under the covers. She was already in the shower when I got to the bathroom.

  I climbed in with her, and we immediately began soaping each other up, giggling like little kids. She began stroking me as soon as I was erect, and I reached between her thighs to return the favor.

  We leaned against each other, Kim against the back wall, jerking each other off. As I had the previous morning, I reached the critical point well before I could do much for her. I moaned out my incipient climax, and Kim dropped down to catch my cum in her mouth.

  When she returned to her feet, I took her back in my arms, resuming my masturbation of her. She resisted weakly for only a second or two, then surrendered to me. I rubbed the side of my finger rapidly against her soapy clit, making her shiver against me. Her nails dug into my arms, and she began to whimper. A few more seconds of this attention were enough to have her spasming against me. Her legs gave out, and I had to hold tight to support her.

  “Shit. Shit.”

  Her legs continued to shake as she tried to stand. She held me tightly, pressing her wet, naked body against me.

  “Oh, God. I think I get it now.”

  “What do you mean?”

  “Sex. I get it now. You just made me come, right? That was what it’s really like?”

  “You never came before?”

  “I thought I had. But not like that. Nothing like that. Fuck.”

  She hugged me again. We held each other for a few more seconds before remembering where we were. We finished the shower without saying anything more.

  So it went for another few weeks. In the afternoon and evenings, Kim simply did her best to suck me off, but in the mornings, in the shower together, we did each other. Almost always, she would get me off before I could do her, but now and then she was able to come first. And no matter when I came, the shower was not over until she had at least one orgasm.

  My balls adjusted to the increased pace fairly quickly, and Kim’s tits continued to grow, whatever the reason. She outgrew her A-cup bras within another month, having gained a cute pair of firm 32B tits. Which meant, of course, that there was no chance of my calling a halt to all this cum-guzzling. At least she was a lot more fun to play with in the shower.

  “You’ve got great tits now,” I said one morning. “How much further do you want to go?”

  “All the way, baby” she said, grinning and rapidly stroking my dick. “As big as Rebecca. D-cups!”

  As she dropped to her knees and set about sucking another load out of me, I gritted my teeth and groaned. Thirty-four B’s were one thing. Kim was about the size of my stepmom by now, which was hardly surprising. But D-cups were another thing entirely. None of the women on Mom’s side of the family had big tits. What was Kim going to do when her tits stopped growing, as they surely had to soon?

  In any case, if I was worried in the back of my mind, in the rest of it I was as horny for her as I had ever been, especially now that she actually had a bod worth lusting over. I wanted to take things further than all these bj’s, but I wasn’t sure how Kim would react to the idea.

  A few nights later, when she climbed into my bed, I stopped her when she tried to dive under the covers.

  “What?”

  “Let me do something for you first.”

  She hesitated for only a second before relaxing and lying beside me. She was naked already (she never bothered wearing her pajamas to my room anymore), and I reached out to caress her tits. When I bent further down, pressing my lips against hers, she did nothing to stop me. She kissed me back slowly and tentatively as I played with her cute boobs. She was getting close to a handful now, enough to squeeze and push around. I slid further down to take a puffy nipple into my mouth, and Kim put her arms around my head.

  When I moved my hand between her legs, she opened herself for me, letting me begin to masturbate her. She got wet fairly quickly, and I worked her clit back and forth with my fingers.

  When I tried to slide further down, though, she stopped me.

  “What are you doing?”

  “Just giving you some of what you’ve been giving me all this time.”

  She gasped softly, but relaxed. I climbed between her thighs and took her wet little pussy in my mouth. She was close enough already that thirty seconds of massaging her clit with my tongue was enough to get her off. She squeaked quietly, arching her back, but didn’t push me away. I continued eating her for about five minutes, getting her off another two times, before letting her rest. I crawled up her body a little ways, laying head between her tits. She held me weakly.

  “Wow.”

  I waited another minute before making the move I had been waiting for all this time. I lifted up on my arms, moving above her. Her eyes flew open as she realized what I was doing. Her breath came in rapid gulps, and she looked up at me fearfully.

  But she didn’t push me off.

  Instead, she bit her lip after a few seconds. Her hands moved toward me, resting softly on my waist.

  “Jimmy . . . you can’t come inside me. Okay? I don’t want to get pregnant.”

  “I won’t. I’ll come in your mouth like I always do.”

  “Okay.” A shiver of anticipation ran through her body. “Is it going to hurt?”

  “Maybe a little.”

  She pulled me closer, sliding her arms around my back. I probed forward, finding her wet pussy with the head of my cock. This was not my first time, Thank God, but I couldn’t remember being this tense ever before. I was about to take my stepsister’s virginity. Jesus Christ Almighty.

  Her hymen was soon pressed against my dick. I thrust forward as gently as I could, and it popped a moment later. Kim tensed up a little but did not seem to be in much pain as I moved inside her. But she gasped softly and arched her back a little as I filled her up.

  I wasn’t going to get her off like this. I would be lucky if I lasted more than a few minutes. Had she not sucked me off twice already earlier that day, I would have come then and there. She was so wet and tight that I had to pause a moment to control the sensations.

  I began to move slowly in her, trying to be gentle and not hurt her. She held me close to her, kissing my neck softly. She tried to move her hips with me. The feel of her tight pussy took over rather quickly, and I could feel the jizz beginning to boil in my balls. I thrust at her faster, lifting off her chest. I looked down a moment later, seeing her watching me raptly as I thrust into her again and again. As I closed in on my orgasm, I withdrew suddenly. Kim darted down under the covers, taking me in her mouth. A few seconds of eager sucking were enough to get me off.

  We lay together quietly afterward, with her head on my chest.

  “That was pretty nice. I didn’t expect it, though.”

  “I know. I couldn’t help it. You’re just so damned hot.”

  She snuggled against me.

  “You think I’m hot?”

  “You are.”

  “Thanks. Do you think people will be able to tell that I’m not a virgin anymore?”

  “I don’t think so. Don’t worry
about it.”

  She hugged me.

  “Thanks, Jimmy.”

  After that, we seemed to have set a precedent. We showered in the mornings, jerking each other off. In the afternoons, I would eat her out to a couple of orgasms, then she would suck me off. At night, we fucked, though I was careful to always finish in her mouth.

  And, to my amazement, her tits continued to grow. A few weeks later, I walked into the kitchen to hear her complaining to Mom that her bras were getting too tight again.

  “Good God,” my stepmother said. “Where on Earth is this coming from? I’ve bought you at least a dozen bras this fall already.”

  Kim gave me a nervous glance, though Mom didn’t notice. Her gaze was fixed on Kim’s ample chest.

  “Look at you! I just don’t know who you’re getting this from.”

  Kim moved up to 32C brassieres that week. She was beyond a handful by this point, so big that we were soon running late in the morning because I couldn’t stop playing with her wonderful tits in the shower. She loved every minute of it, giggling at what she had turned into. She gleefully reported to me that her friends were starting to get jealous of her, and the boys at school had finally begun to notice the change. She was bigger than any of her friends except Rebecca, and she was determined to reach that point come hell or high water.

  One night a few weeks later, after a nice, mutually satisfying fuck, Kim remained in bed with me, lying with her big spongy tits pressed against my chest.

  “Jimmy?”

  “Hmm?”

  “Do you think it might be time to start cutting back somehow? You know how long it took for my tits to start growing. I’m afraid that if I wait until they’re where I want them, they’re going to keep growing past that unless we slow down now.”