The next two days following Dawn's unexpected gangbang were mostly uneventful as far as sex went. We managed to sneak in a couple of outdoor quickies -- one on the beach behind a set of pillars, the other in a changing room -- but overall, we just enjoyed the sun and the atmosphere. We still had one day left, and decided to spend part of the late afternoon in the lagoon style swimming pool/hot tub at the hotel before going to dinner. The swimming pool was large with several "bays" off to the side, each with their own whirlpool jets. The bay that we chose also had an additional bonus in the way of a waterfall, which being unoccupied, we decided to sit near to.
We just sat there enjoying the 80 degree water and the feel of the pulsing jets around our bodies while checking out the other guests at the hotel. There were two other couples in our bay, one an older couple in their late 50's/early 60's, and the other couple appearing to be close to 30. The man and woman in the younger couple were both very attractive. He had a well developed chest that was shaved, broad shoulders, and a handsome face with dark hair. She was quite beautiful with her hair up in a bun, dark eyes that seemed to constantly smile, and a large, but not excessively large chest, probably 34C. As we were all sitting in the water, there was no idea what either looked like below their exposed chests. A few other people walked by, but no one else climbed in and joined us. I leaned back and relaxed as the water swirled around me, and the waterfall poured into the water a few feet to my side while I closed my eyes.
As I was sitting there, I felt a hand begin to rub my crotch. I opened my eyes, and looked at my wife who was turned towards me while leaning on her elbow against the side of the pool with her head resting on her hand. Her other hand was under water rubbing back and forth doing its best to get me hard. I looked at her quizzically, and mouthed what are you doing? She continued and nodded her head in the direction of the other couples. I glanced over, and saw that the older couple had left leaving us alone with the younger attractive couple who appeared to busy as well. The woman was reclined against the side of the wall in the same fashion as Dawn was, and her hand had disappeared under the water in the same fashion. I could tell though that she was working her man's crotch because her elbow was slightly moving back and forth. While she was working on him, she was watching us. I glanced at Dawn and saw that she was also watching the other couple, and briefly licked her lips seductively.