We had known Tina and John for years and never thought they were the type to swap partners. What a surprise my girlfriend Ann and I got at the end of one of their parties.

All the guests had left but Ann and me we were planning to stay overnight since our house was two hours away. Ann and John were down the hall in the bedroom talking, while I chatted with Tina and helped her roll out the hide-a-bed in the living room. As Tina and I talked, we thought we heard odd sounds coming from the bedroom. We quietly sneaked down the hall and peeked in. There, to our amazement, in the soft candlelight, we saw my sweet girlfriend totally naked sucking on John?s length. Her beautiful breasts hung over him as she sucked. He was lying back on the bed and using his hands to pull her down onto him. Tina and I stood there frozen, watching as John groaned and my girlfriend went wild.

Then Tina and I retreated from the doorway back to the living room. Seeing Ann sucking John had really turned me on, but I thought Tina might be ready to flip out. Instead I felt a hurried hand unfastening my belt. I slipped my fingers under Tina?s tee shirt and handled her lush breasts. She slid my pants down and rapped her fingers around my length. I felt her soft wet fur. In a minute we were both naked and on the hide-a-bed, imitating the action in the next room. Tina?s soft lips caressed my length to hardness. I ran my hands thru her long brown hair as she sucked wildly on my prick.

After a few wonderful minutes of that, I pushed her onto her back and rolled on top.

I wanted to ride Tina to heaven. Her beautiful nipples grew ripe, and I sucked each one into my mouth. She moaned. Then I spread her legs, and slipped gently into her.

One sweet kiss followed another as I slowly rode her, slipping the head of my length in an inch, then out, in another sweet inch, then out. Then with a sudden lunge I pushed my whole length into her. She moaned harder and whispered into my ear, "o god, o god, that feels good." Then I found out what a hot woman Tina was. She began to buck her hips crazily and I held on for dear life. I felt like a cowboy on one of those mechanical bulls gone berserk. We slammed together again and again, and before long, our loud moans were mixing with those in the next room. I loved the deep penetration, the feeling of my balls slamming against Tina. I rose up and rubbed her personal place with two fingers, then fell down onto her, grabbing her breasts roughly and biting them. She seemed to be having one orgasm after another. We played for over an hour.

Then she pulled me to her one last time, grabbing my hair and nibbling on my ear. With a sudden rush I was cumming into her and she was cumming into me. We were screaming. I could feel my cum shooting deep inside her. Then we slowly settled down.

Afterward, I stayed inside her for a long time. We kissed and played with each other, and before long did it all over again. We made love four times that night. Strangely, the next morning, John acted as if nothing had happened in the next room. He?s Catholic and was feeling pretty guilty. My girlfriend and I and Tina went for a walk.

We talked about how much we liked what happened, but we all figured that it was a one time thing since John was now suddenly so uptight. Boy were we wrong! As soon as the sun fell below the horizon, John lost all his inhibitions again. Before long, Tina and I were hearing the sweet sounds of playing coming from the bedroom, and we took that as a signal to make our own sweet sounds out on the hide-a-bed.

We played until dawn.