As soon as we arrived home my brother passed out and went to bed. Me and her stayed up for another hour or so talking and drinking more. At about 2 in the morning we finally decided it was time for bed. She gave me a hug goodnight and a kiss on the cheek but right as she pulled away her hand grazed across my crotch. I didn't think too much of it and went to get ready for bed.
About 10 minutes later I was laying in bed with the lights off when the door creaked slightly. I was startled and I could see that it was his girlfriend wearing just a tshirt. She slowly tiptoed on her bare feet towards the bed where I was laying fully naked. She climbed into the bed with me and started kissing me and I could still taste the tequila on her lips. She told me ever since this afternoon she was planning how this would happen. She was straddling me and I could feel the warmth from between her legs. She didn't have any panties on. She started grinding herself as we kissed deeply. I pulled away for a second to ask if she was sure she wanted to do this. Judging by how incredibly wet her pussy was the answer was a resounding yes.
It took a minute but my cock got hard and I could feel her wetness all over me. She told me she wished she could have starting fucking my hard cock on the dance floor earlier. That's when I realized how bad she wanted to fuck me. I told her we needed a condom but she assured me that she was on the pill and she wanted to feel me all natural inside of her. She slipped my hard cock inside of her and I had never felt something so amazing before. Here I was having sex bareback with my brothers girlfriend. She snuck into my room just to fuck me and I couldn't have been more shocked or happy it was happening.
She rode me so hard I knew I was going to cum soon. All I could think about is how this came about and what my brother would do if he found out. My cock had a mind of its own though and given how wet her pussy was and the taboo of the situation I was going to explode any second. I gave her the warning but she just kept on going. She picked up her pace since she was about to cum. I knew I was about to unload and took her tongue and intertwined it with mine and I shot spurt after spurt of my hot milky cum into her cheating pussy. She was still shaking from her own orgasm. We both moaned in ecstasy. She than quickly got up with my seed still leaking from her and closed my door behind her.
The next morning we both pretended as if nothing ever happened and our goodbye was just a hug and see you later. Hopefully next time she sneaks into my room again.