I recently posted this on this subreddit and wanted to finish it in parts. However, it took longer than I expected to write this. So here is the full story! Let me know if you want more, there is plenty more to tell. :)
Disclaimer:
I, Chris, started to grow interested in swinging when I finished school. The relationship to my girlfriend lasted for three years then and we got increasingly curious how it would be opening up and get others involved into our adventures. We were both open-minded towards getting a third person to join us. We used to make up situations in which we seduced men and women alike to see each other getting hot and heavy with another person, but it wouldn’t happen until we went on a vacation together. This is how it all started.