I'd recommend reading SNGLOVER Tales of a Cheating Husband CH.01 before this, as this is my perspective of what happened.
Please note that I have the express consent of SNGLOVER to write this, incorporating part of his work into this to allow the story to be continued.
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My parents had gone away for the weekend leaving me alone in the house, so naturally I did what any fresh 18 year old would do - have her best friend around to drink & party!
A few of my friends had come around that evening & we had steadily made our way through a few bottles of vodka before they left about midnight. Me & my best friend Mel finished off the bottle, chatting & flirting away and were really quite drunk. Just after 1am, my older brother came in drunk which surprised me, as I thought he would be at home with his wife, who I wasn't particularly fond of. Even though we were all drunk, we cracked open another bottle of vodka and had a few drinks with him watching some crappy movie, before the drink took over me & I dosed off.
Some time later, I stirred as I could hear moaning & a slapping noise & awoke to see my brother standing butt naked, pounding Mel doggy style on the sofa. I was so shocked that I shouted "What the fuck?!" as I sat up, my eyes wide open in disbelief at the scene in front of me.
My brother turned around, his 7" shaven, uncut, rock hard cock glistening at me, covered in all Mel's pussy juices. She moaned "No!!" as he pulled out and locked eyes with me. "Why stop?" I asked with disdain in my voice, feeling oddly jealous that her wet cunt had been getting a good pounding even if it was my brother doing it...