My world was almost entirely humid darkness. I could just barely make out the insides of toned thighs, and the short pubes right beneath my nose. I was using my tongue and lips as firmly as I dared on Lonnie's slippery clit.
"Fuck. Hurry up! I'm going to be late for uni!"
I heard her muffled voice commanding me from above the quilt and, as I sometimes did when I was irritated with her, I poked the tip of my pinkie finger up into her clenched anus.
"Oh, you dirty little prick!" She squealed, shifting her thighs. It was strange: she furiously hated for me to anything back there, but she always came faster and harder when I did it anyway.
Which, after half a minute of renewed pressure, was the case now.
"That's it, that's it," she gasped. The heat and the smell of her sex were all around me, and I really worked her with my tongue. She moved her hips in circles, grunting, and I saw her stomach clench. Then she lay back down, relaxed.
The covers were swept off and the dazzling morning sunlight almost blinded me. She was propped up on her elbows, her breasts and her hair hanging freely. She possessed the kind of casual beauty that always radiated from some girls.
"I don't have time for a shower now. Thanks a lot." It was only her eyes that told me the whip crack darkness in her voice was mostly an act.
"And who's fault is that?" I asked.
"Yours, clearly."
I snorted and pushed my almost-forgotten pinkie another inch into her. Her eyes widened, and she bought her knee up viciously into my chest.
"And I told you not to do that!" She stormed, pulling herself away from the probing finger and out of bed. I didn't give her the satisfaction of rubbing my sore ribs as I sat up.
She quickly pulled on some underwear and a pair of jeans. It had been three months since I'd first tasted her sweet, forbidden body. Yet after all that time her clean, tanned curves still seemed new and exotic to me.
She finished getting dressed and tied up her long, dark hair.
"See you later," she said, leaning in toward me and running her tongue in one long, sloppy stroke up my cheek. It was the type of animal gesture I'd come to half-expect from her, with her wild, fierce temperament. She turned and walked off.
"Bye," I said to her retreating back.
I looked over at her clock. I had ten minutes before I'd have to rush to get ready for school. I lay back on Lonnie's bed and sucked the scent of her perfume, her sweat and her womanhood through my nostrils. I pulled my already-hard cock from my shorts and began to pump it.
I let my mind drift away as my body did its thing. Masturbating in your sister's bed, biological sister or not, makes you feel like a pervert. Of course, fucking her three times a week will do that too, but at those times you have an accomplice. With my heart beating already from exertion, I fell willingly into the strange thrill.
