“Oh fuck, David!” she cried, breathless, shaking. “Oooooo make me come, baby brother!”

I grunted, moving my whole head as I licked her, plunging my fingers deep. She strained against me, rolling back and forth, making those same little noises she had yesterday, that little, “uh, uh, uh” until she stiffened and shuddered under me. I could feel the muscles inside fluttering against my fingers when she came, her cunt wetter than ever now.

She reached for me as I sat up, grabbing onto my shirt and pulling me on top of her. My cock was pressed against her cunt, all wet and slippery, and I groaned. She kissed me, plunging her tongue deep into my mouth, exploring the insides of my cheeks, licking my teeth, her hands running up under my shirt and squeezing my nipples, making me jump.

“Dammit, Dawn,” I murmured against her mouth, feeling her hand working my cock between her legs, aiming me. I moaned. “Ohhh fuck, no, we can’t do this.”

“We are doing this,” she said. “I want to feel you inside me.”

“Noooo,” I groaned, sitting up and leaning back on the sofa, my eyes closed, panting. “Dawn, I can’t. I just can’t. You’re my sister!”

She crawled across the sofa towards me on her hands and knees, her tits swaying prettily, licking her lips. “God, I love the taste of my cunt, don’t you?”

I wiped my mouth with my hand, still wet with her juices. I could taste her, smell her, and my cock was a throbbing, weeping pulse between my legs, standing straight up and defying my better judgement. She stretched out next to me, reaching her hand out to stroke me. It was a lazy, easy motion, but I was beyond any edge I had ever known-I was that close.