Girlfriend's Sister

My girlfriend, her sister and I went out drinking last weekend. It started out pretty low key. We did some bar hopping. But at one bar we decided to switch to shots. Since I was driving, I didn't do much drinking.  But the girls started slamming shot after shot and they got pretty toasted. They tried to play some pool, but didn't do so well. But when they got their hands on the pool cues, things took a different turn. They started making cracks about cocks while cueing up their shots with the pool sticks. We eventually decided it was time to go home. And all the way back, I listened to the two of them compare guys in the bar. They talked about everything... who they thought had a big dick, who they would fuck, who they would suck and stuff like that. I had never hear my girlfriend talk like that before. I was a bit shocked. Anyway, we drove to her sister's house to drop her off first and of course, we had to go in. When we were inside, the girls wanted to watch a movie. Not just any movie, but a porn flick. They were so horny, they couldn't take it and wanted to see some cock. My girlfriend's sister put in a dvd and we grabbed a beer and began to watch. The talk of cocks and sex continued. Every threesome scene that popped up, they teased me about maybe being lucky enough to be the man in the middle of two hot chicks. My girlfriend was watching and drinking, but her sister was watching and playing. I noticed her jeans were unbuttoned and she was slipping a hand to her crotch. Between the two girls and their talk of sex and the dvd, I was pretty horny. The next thing I know, I hear a bottle hit the floor. My girlfriend had passed out. Her sister helped me move her to a bedroom and we stripped her down and tucked her in. She was down for the count. As we walked back to the front room, her sister apologized for the raunchy talk. I said it was fine, they were drunk and I admitted that it got me turned on and the porn dvd was about to push me over the edge. She then took me by the hand and led me to her room. She said it was unfair for them to get me in such a state and sat me down at the foot of her bed. She was talking and rubbing my leg and then before I knew it was rubbing my crotch. She said she was totally turned on too and wanted to do something for me.   She got up and pushed me down on my back.  As she returned to the foot of the bed, she stopped and unbuckled my jeans, popped the snap and unzipped them.   I was hard as a rock. I could still hear some woman on the porn tape moaning and my girlfriend's sister's touch was keeping me rock hard.   She took off my shoes, then the socks. As she slid my jeans and underwear off, I took off my shirt. I was now laying totally naked on her bed. She got up and went to the bathroom. She returned with a bottle of oil and poured on my erection.   She then began to slowly stroke me. The deliberate up and down movements of her hand were pure heaven. She ran her hand down the full length of my shaft.   I could only moan with delight. She slowly picked up her pace and I began to thrust my hips with her movement. So I was rocking at a pretty good rhythm and she was stroking me just as fast. It wasn't long before I shot my load.   It sprayed over my stomach and chest. I couldn't believe how much cum came out of me.   She smiled and slowly licked it off.   I returned the favor... and it didn't stop there. The next time I came that night, I was deep inside of her. It's our little secret... and now it's yours too.