The sweetness—somehow, it felt more intense than usual. Though it probably wasn't actually different, the fact that I was kissing my sister, who now understood my feelings, made it seem that way. As I was thinking this, I felt something soft, even softer than lips, prying mine open and entering my mouth.
Startled by the unfamiliar sensation, I nonetheless welcomed it eagerly. My sister's tongue, having entered my mouth, began to toy with mine, mercilessly exploring every corner.
After a while, we broke the kiss to catch our breath, only to press our lips together again. This time, her tongue entered immediately, and I think I did a better job than before. Still, as we continued, I began to feel short of breath, and when we finally parted, my head felt foggy, either from lack of oxygen or perhaps for some other reason.
Then she asked, "Do you want to undress yourself, or should I do it for you?" With my mind not working properly, I responded, "…I'll do it myself. But it's embarrassing alone, so you undress too." Oh, I realized vaguely, we're really going to do it now.
We each removed our clothes, leaving our upper bodies bare. Even though we see each other like this all the time in the bath, my heart pounded as if it were the first time. Without thinking, I murmured, "You're beautiful," to which she quickly replied, "You're the beautiful one." I knew that couldn't be true, but if that's what my sister thought, I didn't mind.
As I was mesmerized by her body, she began touching me in various places—squeezing my upper arms, poking my stomach, and playing with me. It tickled so much that I couldn't help but laugh.
"Hehe, it tickles, Sis."
"You'll get used to it soon."
As she touched me, I also wanted to touch her, so I reached out and traced her smooth back. She froze, her expression one of barely contained restraint. The look was so cute I wanted to see it more, so I got a little bolder, tracing her back, squeezing her stomach, and planting light kisses as I slightly lifted my body. Her demeanor changed, her eyes gleaming like a beast eyeing its prey.
"Mm, you seem to be having a lot of fun. I was planning to take it slower, but I'm going all in now."
As soon as she said that, she reached for my chest. My chest, small enough to fit entirely in her hand, didn't seem to bother her. Having someone touch my chest for the first time was a strange sensation, somewhere between ticklish and pleasant. The stimulation was less intense than I had expected, but I was filled with affection for her.
That was only at first. Suddenly, she pinched my nipple, and it was like a jolt of electricity shot through my head, causing me to let go of her back.
"W-Wait, something feels weird…"
I pleaded, but her hands didn't stop, and even though I squirmed, she wouldn't let go. I could feel my body heating up.
"Mm, ah, wait, Sis."
"Oh, Kaya, you're so adorable."
My body moved on its own, and for some reason, I felt a tightening sensation in my lower abdomen. As I was processing that, my sister disappeared from my sight, and instead, warmth enveloped my left breast.
"Ah, no, don't lick there…"
Even though I said that, she didn't stop, sucking on my breast like a baby, while her other hand continued to toy with the other side. Overwhelmed by the unfamiliar sensations, I felt something welling up inside me, and before I could resist, it swallowed me whole.
I knew I needed to stop her, but my body wouldn't listen; instead, I found myself clinging to her, pressing against her body.
The intense stimulation left me unable to resist, and I was hit with an unbearable wave of pleasure. My body tensed up for a moment, and my mind went blank. After a while, I was left panting and completely drained.
As I lay there, exhausted, my sister finally lifted her mouth from my chest and gazed into my eyes. Without saying a word, we understood each other, and our lips met again.
Ah, I really just had sex with my sister. I hadn't known what it would be like before, but this is what sex is. Feeling her need me so desperately and sensing her deep love for me, I was overcome by the lingering warmth. As I basked in that feeling, thinking of how I could reciprocate, I suddenly felt a jolt in my lower body.
"Ah, ah, wait, not there…"
I tried to protest, but my words were silenced by another kiss. The sound of wetness in my ears and the thick scent of my sister heightened my arousal. As she touched places I'd never even touched myself, the earlier sensations began to feel like mere child's play. Without thinking, I clung to her, embracing her softness with my entire body.
"Mm… Mmm…"
With that final burst of intense pleasure, my consciousness faded.