Warning: The story has some same sex moments, please avoid reading if you are not open to it.
*****
I woke up with a shudder, 30-40 minutes after I had fallen asleep. I saw Rahul, sleeping at the other extreme of the bed, completely naked. My sister's panties were lying on the bed, between the two of us.
I picked Nikki's panties up, rolled it inwards and had another go at the crotch. There was a distinct smell of my sister's pussy juice, but I could also smell Rahul's jism, and it felt nice.
I moved towards Rahul, and wrapping my fingers around his half-erect dick, brought it close to my nose, sniffing the head. I rolled down his cock's foreskin and sniffed it again. This time the smell was stronger, but I liked it.
Soon, I put his cock in my mouth and felt it growing inside me. Rahul was wide awake by now, he bent forward, catching me by my hairs and urged me to suck him forcefully. He picked up my sister's panties from the bed and had a go at the crotch. I felt nice that he was sniffing my sister. I got hard too.
What happened next was something that none of us had foreseen. While, my room was locked, the bathroom wasn't. And through this door walked in my little sister Nikita.
I still remember the incredulous look in her eyes as she saw me sucking Rahul and him sniffing her panties. She must have been in the room for 10 seconds, but it felt like eternity.
Then, she turned back and shut the bathroom door with a thud.