**DISCLAIMER:
All characters in this story are over 18 and purely creations of fiction. Everything depicted is intended to be consensual acts involving adults. This is meant to be a fun story with only a loose connection to real life. It is not meant to be realistic. This is meant to be read for enjoyment, so hopefully you have some fun reading it. Thanks!**
**This is the third part in a series. The first part is A New Job: Casting a Classmate**
As I got dressed I considered all that I had done so far that day. After doing some chores and work around the property in the morning I had gotten ready for shooting the second scene in my burgeoning career as a male porn star. My first scene the day before had gone incredibly well. After a few hiccups when I figured out my costar was my high school crush it had turned into the best sexual experience of my life. My second scene, a glory hole scene, had a strangely similar complication when I discovered my next costar to be my high school French teacher Holly. But that issue had turned into a delight when my teacher eagerly joined with me and our director for a quick post-pornshoot threesome.
But the day hadn't been all smooth sailing, even after I found out my teacher was a cock hungry slut who didn't mind milking her former student for all the cum in his balls. Sofi, who was my step-sister's best friend, my landlord, and my new employer, had taken it upon herself to inject some very strange ideas into my mind. During the scene with my former teacher Sofi had enjoyed teasing me with whispered words. I normally enjoyed the ways Sofi used her power to tease me, but this time it took a different turn. Sofi had chosen to tempt me with lewd details about my step-sister Helen, and this had sent my mind into a spiral that I hadn't recovered from. Even as I finished dressing I couldn't help but imagine what further dirty facts Sofi knew about Helen, and how she had gotten that knowledge.
My train of thought was abruptly interrupted when I heard a knock at my door. Shortly after I heard my step-sister's voice, which made my heart first skip a beat and then begin to race. "Hey, is it alright if I come in?" She asked.
Taking in a quick breath I tried to calm my racing heart. I also took a quick sniff of myself before responding, making sure that the shower I had taken with Sofi and Holly had washed off the scent of sex. "Um, yeah. That's fine." I called out, trying my hardest to sound casual and nonchalant.
As Helen stepped into my room I held my breath. As soon as I saw her I couldn't help but remember what Sofi had said about my step-sister having an amazing body. Though Helen was wearing fairly normal business attire since she had just come home from her PR job at a fancy tech company, I saw for the first time how good she looked even in those clothes. Her next words didn't help me pull my thoughts away from how much better she would look in a tight dress. "So, Sofi just invited me to go out shopping with her tomorrow since I have the day off. And because you haven't really gotten out of the house since you moved in with us, we were wondering if you might want to tag along? With the money Sofi's been paying you I'm sure you have enough to spend a bit on an update to your wardrobe." Helen told me.
My mind immediately started to imagine my step-sister and Sofi together in a changing room, and my thoughts alternated between me peeking in on them or having me already inside with them. I tried to dispel these ideas, but I was only partially successful. The thoughts I had imagined were arousing enough that I felt my cock twitch and begin to grow even though I had just cum twice not too long ago.
Needing to give my step-sister an answer so that she wouldn't stay long enough to find me sporting a full on boner I scrambled to put some words together. "Uh, yeah. Sure, whatever. I can do that." I told her, fumbling with my words and trying not to look too leeringly at her body. I didn't even think too much about agreeing to go with them since I was in such a hurry to answer her.
Helen chuckled, amused by my awkwardness. "Okay then, we'll have breakfast together tomorrow and leave after that." She said, giving me a curious look before turning away and leaving my room.
Once she was gone I let out a heavy sigh of relief, but I also felt shame creep over me. I felt like a complete fool. I had let Sofi's teasing words take over my head, and I had acted like a weirdo towards my step-sister. I had never had an issue interacting with Helen in the few years we had known each other, but now I couldn't shake the desires Sofi had planted in me. And this was after I thought I had gained so much confidence by having sex with several incredible women on camera. Just one look at my step-sister in completely normal clothes had reduced me to acting like a fumbling idiot overwhelmed by the sight of his crush.
And now I had agreed to go out shopping with her and Sofi. It took me a few minutes after Helen had left for me to realize the potential consequences for what I had agreed to. I was glad for a chance to get out of the house, and I had been looking for a way to use some of the money Sofi had been paying me, but this felt like a trap. I was sure that Sofi had been the one to suggest this idea. I normally didn't mind a bit of teasing, and I had grown to thoroughly enjoy the way Sofi usually liked to play with me, but I was pretty sure that this would be a bit different than the playful games Sofi liked to use to spice up our relationship. I was sure that Sofi would be far more familiar with me than it was a good idea to be. Helen didn't know about our sexual relationship, and I wasn't eager to let her know. I was also certain that she would use this trip to torment me even more with lewd ideas about Helen.
I was fully correct about both worries, and it didn't take long for it to start. My step-sister drove us, and Sofi sat in the back with me. During the ride she brushed her hand up and down my leg as she talked about how eager she was to try on some new bikinis and clubwear with Helen. And if that wasn't bad enough Sofi also teasingly suggested that I should help judge how good they looked in the various clothes they picked out. I tried to reject that offer, but before I could get the words out of my mouth Sofi reached around my leg to the inside of my thigh and squeezed my dick through my pants. I had to bite my lip to keep from moaning loud enough that my step-sister would hear. And in the time it took me to compose myself Helen had eagerly agreed to wanting my help. I didn't argue, because I didn't want to confess the real reason why it would be awkward for me and I couldn't think of a fake reason fast enough.
We went to a few other places before going to the clothing stores, and during that time I tried to pretend that this was just a normal shopping trip. And that went mostly fine, and I began to actually enjoy myself. I grabbed a few new decorations for my room, a few board games I had wanted to try out, and some other random things. I was actually feeling fairly calm and comfortable until I found myself sitting outside some changing rooms and waiting for Sofi and Helen to present some outfits they had found. They had brought several large bundles of clothes with them, so I knew I was in for a lengthy show.
I took deep breaths as I waited, trying to keep myself cool and collected. It wasn't helping that the store was busy enough that Helen and Sofi had gone into the changing room together. The door to the changing room was a curtain hung short enough that I could see the tops of their heads, and it was short enough that it didn't even cover their calves. With that view I could see how close together they were as they giggled and laughed, even as the clothes they came in with came off. What Sofi had already told me had let me know that she had seen my sister naked before, but having the fact of how casually my step-sister got naked with her friends demonstrated to me was far more exciting than I had wanted to get.
When they pulled aside the curtain and stepped out I had a few new things to focus on. Sofi was in a tight little black dress that had a neckline that plunged all the way to her navel. It was long though split up the side in a way that showed off most of one leg. But what drew more of my attention was the dress on my step-sister. Helen was wearing a peach colored dress with several large cut-outs. One above her breasts which was a window for a generous amount of cleavage, and another below showing off her midriff. There were also open spaces on her back and sides, which she showed off as she spun around to show it off for me. The dress was very short, letting me see how slender and shapely her legs were.
Both women asked me how they looked, and I was only able to fumble out a half-hearted general approval. Anything more and I would have risked showing how much the sight of my step-sister in the revealing dress had aroused new desires in me. Sofi and Helen just giggled at my answer before returning back inside the changing room to try out new dresses.
They paraded a variety of dresses and other clothes for me, and nearly every single outfit for both of them was as provocative as their first dresses had been. They sometimes even came out having simply swapped clothes. They continued to ask for my thoughts, and I continued to stumble through vague answers, not wanting to reveal how turned on I was getting. This was especially difficult as they started to present different swimwear. I had to shuffle awkwardly during the time they were mostly hidden in the changing room as I dealt with a stiff boner. Thankfully the pair of jeans I had worn that day fit me in a way that made it somewhat easy to hide my arousal.
It only became a real problem when the ladies gave me a surprise. When they walked out in the clothes they had arrived in after presenting the last, and most skimpy, set of bikinis. With this I had thought we were done. But instead Helen and Sofi hauled me onto my feet and shoved me towards the changing room. Sofi pressed a pile of clothes in my hands as I pushed through the curtain. "Sofi told me she's planning a party or two for some of her coworkers, and she wants you to help out during it. I know you outgrew the only suit you had, so you need to try out some new formal wear." Helen told me, giving me a smirk. For half a moment I both prayed and dreaded that my step-sister would join me in the changing room, but to both my relief and my frustration Helen walked away towards where I had been sitting and waited with Sofi.