Contaminated Desires Ch. 03

If I thought things had been awkward a bit lately, nothing had prepared me for what was coming next. The heat was on!

I came home a Saturday afternoon. My mom and sister were outside in the garden - where they always were nowadays if they were at home. My sister was laying on the sun bed, my mom sitting next to her. She was just about to rub sunscreen on my sister's back. I watched her squirt some of the substance in her lower back and with long form strokes rubbed it in. Mom paused for a moment, pulled on the little strings behind my sister's back and untied my sister's bra. Then, she continued rubbing my sister's back. She leaned forward, said something to her daughter which I couldn't hear, and continued her almost massage-like motions.

Then, the most insane thing happened: mom's hands moved to my sister's sides, caressed the swells of her breasts, then pushed her hands underneath them and.... cupped them! My sister rose up, moms hands got a better hold, and squeezed her daughter's tits again. She smirked at her, then said something else. Sis took her bikini top off completely, and mom did the same. Mom said something else to her daughter, got up, and walked away shaking her hips. Then she looked right at me, as if she had known I was standing there. "Hi son!" she cheered, definitely loud enough for my sister to hear as well. But my sis didn't bother to cover up.

After that Saturday afternoon, she took the teasing to a whole new level. When she was making sure I was watching - which basically was all the time - she'd always found a way to show skin. Wearing a button-up shirt? She'd bite her lip, and undo a few buttons. Wearing a shirt with a zipper? She'd toy with it in front of me, pulling it low enough to flaunt the swell of her tits. Wearing a shirt with shoulder straps? She'd make sure one of them was off-shoulder.

Then there were the skirts. Oh god, the skirts. My sister was parading around in tiny little fabrics that hookers on the corner of a street would even find revealing. Some were skin tight which had a tendency to ride up. Others were pleated which danced around as she walked. And if she wore those, she always had a bounce in her step.

She knew she had my attention, and she knew she was making me hard. And she was enjoying every second of it. As mom wasn't like that at all, I wondered if this was my sister's kink: an exhibitionist. That she likes to show off her body. And that me watching her, fueled her desires. And that only caused her to tease me more - like catch 22 situation, spinning rapidly out of control. It was like... something or someone held her back before, and that had blocker suddenly been removed.

At this point in time, I was still considering trying to find a fix for this situation. Yes, she got me hard almost 24 by 7, but I still felt guilty for what was happening. But finding a solution, was hard as hell when there's a vixen seducing you constantly. And finding creative ways to do so as well.

Well, I mentioned how she would use her cleavage to tease me. That was happening today as well. She was wearing a black top with a zipper. As she had done so many times before, she used the zipper to tease me. This time however, she "zipped" a little too far, and - even though briefly - got a full view of her nipples.

And she just said "oooops", then smiled at me, and pulled the zipper up just a bit.

A couple of days later, she did the same, flashing her breasts. Mmm, they seemed so enticing, a nice hand full, with her perky nipples always standing proud... After the fourth time, she didn't even "apologize" anymore, just teased me with them.

Sunbathing poolside? She didn't even bother putting on a top. God, watching her oil her tits with sunscreen was so delicious. Or - just as hot - she'd take a t-shirt, soaked it in water, put it in the freezer for a bit, then after a while put it on while it was still wet just ice cold - and that really made her nipples poke.

I found myself less and less in the basement.

"Hey bro, can you come in here for a sec?" I heard from the bathroom as I walked by in the evening. I stopped in my tracks. Was she now inviting me into the bathroom? The door was ajar, and I pushed it open. I found her sitting in the bathtub, taking a bubble bath. And there were lots of bubbles. Hesitantly I moved closer. "OK, I'm here..." I replied.

"We've been living together for how long and I still feel like I don't really know what's been going on in your head lately."

"And you want to talk about it now? While you're taking a bath?" I asked surprised.

"Well, why not? I'm only taking a bath, nothing weird. People take baths all the time."

"Yeah, but.... you're naked...." I stammered, not being used to her dressed in nothing and being so close to her.

"Oh please, there's so many bubbles, nothing to see right now..." She was so casual about it.

"OK, so.... what would you like to talk about?"

"You ever feel like we talk about everything and nothing at the same time?" she asked with a genuine curiosity.

"You mean we never have a meaningful conversation?"

"Yeah, you know.... what's going on in your life right now? Besides talking to your sister who's bathing naked in a bubble bath right beside you." She giggled a bit saying it like that, almost mockingly. "Like, what's going on in that basement of yours?"

I took a deep breath, realizing I needed to tread carefully here. Nothing about the accidental mix-up!

"Well, I was working on an idea to make a fat-burning cream, one which allows you to target certain areas of the body."

"Oh, that would be a fantastic product! Are you close to realizing it?"

"Well, I was making some good progress, but with the heat down there it's hard to concentrate."

"Ah, bummer. Sorry for not wishing you colder weather, because I'm loving this weather" she cheered. "So, if your mixture is ready, would you use it yourself?"

"I tested some of the batches on me, yes."

"You don't have a whole lot of fat. Where did you rub it?"

"My belly of course. With mom's cooking, that's the first place it grows..." I joked.

She giggled for a second. "Hypothetically, if your mixture would work... What body part of me do you think I should try it on?" she asked.

"Is that a different way of asking if I think you're fat? Because I don't." I replied wittingly.

"No, not at all, just... curious. If you have to name one part of my body, which would it be?"

"One body part?" I thought for a moment. I didn't want to comment on her ass -- which was more than fine anyway -- nor her belly. Her arms and shoulders are defined. "Not easy, sis, but maybe.... your legs?"

"What's wrong with my legs?!" she said sternly, then giggled. "What, this leg...?" She pulled her leg out of the bubble bath and put it on the side of the tub, letting it rest on her heel and her calf. "Or do you mean this leg....?" She pulled her other leg upwards as well, stretching her toes, the bubbles slowly sliding down.

"Oh, I stand corrected, your legs are fine..."

"Just fine, or....?" She teased, then there was a long pause, neither of us sure how to continue from here. Just as I was about to get up, she spoke again: "It's kind of weird how comfortable we are with each other, isn't it? Like, I could be doing anything in here and you'd still just... chill on the edge of the tub like it's no big deal."

I gulped for a moment, wondering what she meant with that. "Well, I don't know about that..." I said, realizing I wasn't comfortable at all.

I could see she moved her hand to the center of the tub, just not to where. She let out a soft moan. I looked shocked, then she burst out in laughter. "Ha ha ha, you should see the look on your face...! See, I was only joking" She held up both her hands, then made another moaning sound. "See?"

I still wasn't sure she had been faking it.

"Bet you didn't expect your evening would involve steamy conversations and strategically placed bubbles, huh?"

"No, I hadn't. And, seeing that the bubbles seem to wane a bit, I think it's time for me to leave. Before things get.... weird between us."

"Oh, I don't mind... I trust you, and it's nothing you haven't seen before" she casually said.

"I trust you too, but I should still leave...." I got up, realizing it was myself I wasn't trusting anymore.

I didn't know what my sister's intentions had been for that bathroom-talk, but it hadn't changed her flirty and seductive behavior one bit.

It was a Friday later afternoon. Mom was downstairs in the kitchen cooking a meal, dad wasn't home yet. Sis called me over again. "Hey bro, I'm going out tonight, and I'm can't decide what to wear. Can I... show you some outfits and you give your opinion?" I looked at her bed, and there were 4 or 5 combinations spread out.

I realized this was of course another tease of her, but if I would say no, she'd find another way. "Ehm.... sure..."

"Great! Let me put on the first one!"

I wanted to step out of her room so she could change. "Where are you going?" she asked.

"Just.... give you some space to change..."

"Come on, bro, nothing you haven't seen. But if it makes you uncomfortable, just... turn around, look away."

"OK...." I stood still, looking out of the door. Despite how mom and dad had behaved so far they surely wouldn't mind what we were doing, but I still felt a sense of security knowing I could watch them walk by if the situation presented itself.

"OK, you can turn around now."

I turned, and she was standing in front of me. She had put on a black mini skirt and a blue negligee. It was more lingerie than a shirt, with a broad lacy stripe running up all the way to where the cups for her breasts are.

"So, what do you think?" she asked cheerful.

"That looks more like lingerie...." I replied.

"Yes, but I think it looks really good on me."

"It does, but maybe not... in a club..."?"

"Hmm, you could be right...." She pondered for a minute. "OK, next outfit..."

As she started to take off her top, I quickly turned around again.

"OK, ready" she giggled, and I turned around again. She was wearing a black minidress with some white accents. On her left leg, there was quite a long slit to the top of her thigh.

"That looks quite good on you, sis. The slit is daring though. It will give you freedom if you dance, but... you might show a bit too much skin...?" She seductively swirled around a bit. I think I can get away with it, but I understand what you mean. But it looks good, huh?"

"Yeah, it looks good..."

I turned around again for the next outfit, until she signaled she was ready again. This time, she was wearing a mint-green knitted minidress. Just a single thin strand of wool was running behind her neck to keep it up, her breasts were well covered, but the rest not. "Ehm.... it's kind of see-through... I can see your panties....." I stammered a bit.

"Really? I hadn't noticed. How obvious are they visible?"

"Obvious enough to say you're wearing a teal thong" I replied.

"You think it's better if I take them off?"

"Take what off?" I asked.

"The panties of course, silly" she giggled. "If I'm not wearing them, they can't see it either" she continued to giggle. "Not the first time I've gone out without panties anyway...."

"Oh geez, sis. Don't say things like that to me!" I said, still feeling my rod in my pants respond.

"Oh, relax, you're so uptight..."

She reached for the next pile on her bed. "OK, next up... I have this leather top, but 4 different skirts, so..."

"OK" I replied, then turned around again. It took her a bit more time to change, but finally she was ready. The leather sleeveless top was enticing -- clung around her waist as if it were a corset, lifting her breasts. Her miniskirt however, was the real eye-catcher. Also black leather, not super tight, but snugged her hips and legs well, ending at the top of her thighs.

"Oh wow, that's... quite revealing..."

"I know, right?! Or do you think it's too revealing for me?" She turned around, and her butt was only barely covered.

"Sis, this is short, really short..." I could feel my cock stirring some more. "If you're looking for a one-night stand in the club, this will surely get the job done. If that's not what you're going for, maybe keep this one to the bedroom only..."

"Yeah, you're right, especially because it tends to run up a bit."

I turned around for the next skirt, this time a black denim pleaded mini.

"Hmm, also quite revealing, sis." I started.

"Yeah, it's an older one. I bought it when I was a little younger, and one size smaller. So, I have to push it up a bit too high, and that causes it to flair even more. Maybe if you'd hurry up with that mixture of yours..." she winked. If only she knew it was my mixture that was maybe causing all of this....

I turned around for the next, and last one. "OK, ready?" she asked, and I turned around. I expected with her flirty behavior that this would be the most revealing outfit, but it still made my jaw drop. There she stood, in a bright red super-tight miniskirt, possibly even shorter than that black leather one from earlier. Yet, that wasn't the most daring part. Over the entire short length, starting from the top of her left thigh all the way to her waist, it was completely open, only held together by 4 rectangular metal clasps. She had positioned the fabric so risky, that turned half an inch more to the middle, and I would have been able to see the absence of her panties. God, her panties... no panties... If the fabric would shift, I would be able to see her pussy...

"Fucking hell....."I mumbled, my dick instantly rock-hard.

She bit her lip, realizing how slutty she must have looked. I wondered if her heart was beating in her throat just as mine did. My palms turned sweaty and I was sure my face was as red as her tiny little skirt.

"Sis... no panties...." I gasped.

She chuckled and gleamed. "Yes, I know.... I said I sometimes do that, didn't I?" she teased. "It always gets me a little bit hot and bothered doing that."

My cock was so hard, it almost hurt.

"Let me tell you a little secret.... My panties were off before too..." she whispered in a husky voice.

"I.... I..." I stammered, then bolted off. It was too much to handle, not even bothering which outfit she'd choose in the end.

After that, knowing how she could drive me wild, she continued to tease me with her short skirts. She had done some teasing with short skirts before, only now she didn't mind flashing me her panties as she did it. She'd sit opposite of me, and either would lift her leg or slightly spread them, until her inner thighs parted. She'd be wearing those sexy thongs, with the thin fabric pressed against her pussy. If I were lucky, parts of her folds would be on display. She kept the views brief, yet plentiful. And fuck, how hard she made me with that lewd behavior. When she did that, she was always smirking. She seemed to have figured out that her teasing me with her panties under a skirt, would get me harder than walking just around in her panties. Maybe it's the teasing mindset? Or that there is still some form of mystery? Which panty is she wearing? What will she show me? Or maybe this would be the day she's not wearing any? I was expecting her to push that boundary as well.

And each night, I could hear the moans coming from her bedroom. Almost like.... her climax, was her lullaby.