"Gwynne, I'm going to come!" I cried.
"Mmm-hmm!" she replied, pulling her lips up to wrap them tightly just below the crown of my c**k head.
She pulled insistently, and then she moaned deliriously as I came in her mouth. She gulped down my sperm loudly, moaning and shuddering all over as she did. I stared at her face, unable to accept that this was my sister, but she looked impossibly happy as she drank my semen.
"Oh, God, I'm coming," I whimpered.
"Mmm-hmm!" she moaned happily.
"I can't believe I'm coming in your mouth," I added, even as I watched her gulp it down.
I shuddered again and again as she drained me, staring in disbelief at her face the entire time. When she finally extracted every drop she could pull out of my supersensitive shaft, she sat back and smacked her lips befor
