My wife, Julia (f26), and I (m27) went on our first vacation together. Our trip took us to the mountains, where we stayed in a wellness hotel. Our idea was to be active during the day so that we could relax in the evening.

So on the third day of our vacation, we went on a long hike through fields, forests and into the mountains. After a few hours, we returned to the hotel in the evening. On the last few meters we grabbed a beer for the way, so we arrived at the hotel a little drunk.

We really wanted to cool off after the long walk and so we went to the wellness area. However, it was already time for dinner, so there were hardly any guests left in the wellness area apart from us and an older couple in their 50s. Both couples were relaxing on their own. We sat in the whirlpool and let ourselves go. The older couple were in the pool.

But then the man got up to get his camera and took some revealing pictures of his wife. The woman was quite petite and was wearing a skimpy bikini. She tried different poses to show off her charms. Julia and I kept looking over at them unobtrusively to watch the model shoot. Due to the alcohol and the sexy poses, we both got hotter and hotter in the hot tub.

We moved closer to each other and started kissing and touching. Suddenly, the elderly couple packed up their things to go to dinner too. They smiled at us as they left and wished us lots of fun. We were finally alone. Julia then jumped onto my lap and we continued kissing through the horniness from earlier. My hard cock rubbed against her vagina, separated only by her swimming trunks and bikini.

We could no longer suppress our desire, so I took my cock out of my swimming trunks and pushed her bikini aside. I was able to penetrate her directly and thrust deep inside her. With small rhythmic movements, Julia's horniness increased. I could feel it through the louder moans and the fact that she was holding on to me tighter and tighter as we continued to move together in the whirlpool in the riding position.

She moaned in my ear that we weren't wearing a condom. I then told her that water kills sperm and she shouldn't worry. After hearing that, she was finally able to let go of her thoughts and concentrate fully on the sex. It then only took 2 minutes before she had an orgasm and got off me completely exhausted. She then sat next to me in the hot tub and asked if she still had any strength left. Unfortunately, she couldn't offer anything else apart from manual labor. But I gratefully accepted that too. So she gave me a handjob in the water until I came. That was the first time she had seen the viscous sperm in the water. She found it so fascinating that she examined it closely.

When she had finished her analysis, she was worried that the sperm might still be visible when other guests arrived. I didn't care, I was just happy to have come through my wife. She then came up with the idea of simply turning on the hot tub so that the sperm would be mixed with the water. No sooner said than done, our sex experience in the hot tub left no traces.

We then went to dinner and sat down next to the older couple from earlier. All four of us just grinned at each other and we all knew that there was going to be a lot of lovemaking that night.