I let the warmth stream over me. I focused the spray on the back of my neck and let it give me a mini massage, relaxing me to the point I lost some awareness of where I was or how long I was in there. Between that and the post-ejaculation wave of calm, I was feeling very relaxed at the moment.
And then I heard the little click of the glass door opening. I spun around and saw Carly standing there, eyes wide open, mouth over her hand, naked from head to toe. She froze, I froze. She squealed, I yelled. She turned and ran out the door to her bedroom. I turned the water off and went for a towel to wrap around myself. What in the hell had just happened?
I was still in shock, having had my serenity shattered. Carly was naked, stepping into the shower with me. Why? Wait, she was naked! I closed my eyes and then the sight reformed in my head. I saw Carly’s short brown hair, tussled from her run. Her naked tits, not as large as Karina’s, were still quite nice on their own. My sister was around a C cup I estimated. Her nipples were not quite hard yet, but I could see that her areola were larger and darker than her friend’s. My sister’s tits had some natural sag to them but still stood out quite well. She had an all-over tan and, surprisingly, no pubic hair. That meant she either shaved or waxed her pussy regularly. My sister had a nice, clean looking pussy. No visible hairs, labia protruding just slightly from her pelvis. While I lusted after Karina, my sister was very sexy in her own right.
Honestly, I always knew Carly was pretty, cute, attractive, whatever words you wanted to use to describe her. It was obvious, even to a dork like me. She was always popular with guys, and more than once in high school, classmates had approached me to ask about her. Was she dating? Did I know if she liked them? I always stayed out of her business, mostly because I just didn’t care. I had seen her in varying stages of undress over the years as she developed. I knew her boobs weren’t small. I knew her butt was shapely enough. I knew she worried about her tummy being a little too pudgy, even if no one else thought so. But I never saw her in a truly sexual light. It was all a matter of fact for me, since I was just her older brother, and she was just my younger sister. Even seeing her in bikinis never really caught my attention, although that might have been because I was always so laser-focused on Karina, since she was so often around.
Well that all has changed now. I knew what my sister’s pussy looked like and I liked it. I had seen her nice tits, the whole package. I dried off and contemplated jerking off again as I sat there on the edge of my bed. I mean, my dick was hard again thinking about all of this, why not? But something stopped me. Guilt, intuition, whatever it was, I was glad that I held off. Because seconds later, before I could even get up off the bed, there was a knock on the bedroom door.
“Trevor?” It was Carly. “Are you decent?”
“No!” I hollered back. “Give me a second.”
I popped up and grabbed some boxers. I pulled them on as I walked to the door. I opened it and Carly stood there, her head hung in shame. She was wearing a thin, slightly damp t-shirt and some red shorts that I noticed barely came past her ass cheeks as she walked past me into my room.
“Close the door please,” she said quietly, and then sat down at my computer desk.
I complied with her request. “Look, I didn’t hear you knock earlier. I’m sorry.” I started out, trying to smooth things over, figuring she was going to read me the riot act again.
“No, that was my fault. I didn’t knock,” she confessed, barely making any eye contact with me. This version of Carly was not anyone I had ever seen or met before. She acted meek, almost shy. This was not the bold, up front, in your face, confident sister I was used to.
“Oh, it’s alright. I didn’t really see much, and something like that was bound to happen eventually,” I reasoned, trying to reassure her. Not the role I was accustomed to assuming in our relationship for sure.
“I’m … I’m sorry. I thought that it was Karina in the shower already, so I just went in.”
“Oh. Ok.” I paused, the wheels in my head turning slowly. “Wait, so you were going to shower with her?”
“Well… yeah.” Her voice was barely a whisper.
“Oh. Ok then.” I was confused. Why was she telling me this?
“Go ahead, make fun of me,” she said, her voice cracking.
I paused for a second to glance at her eyes. They were pointed right at the floor, “Carly, I don’t understand what you expect me to say here.”
“Well,” she started. Before she got any further the bathroom door opened up and Karina popped her head in.
“Hey. There you are,” she said, smiling at me. “Harold and Vivian called to check on us.” It still was a little strange to hear my parents called by their first names like that. “And we’re out of bottled water. Ok if I jump in the shower now?” She gave Carly an odd look. I nodded, then she closed the bathroom door. Carly looked at me with fear in her eyes.