Crashed a class reunion when I was 17, and had the most awkward morning of my life [MF]

A couple of years ago, I was invited to a class reunion party. The party was held on a ranch with a pool, there was absolutely nothing around us for in the radius of a couple of of kms, so we had no fear of being seen or interrupted or anything. We were all 16-18 at the time. I had not been in that class, matter of fact, I didn’t even live in the same country. I was just invited to the party by a good friend of mine I see every summer.

After a while (and a lot of booze) things got hot, and the girls started taking their bikinis off and stuff, and we were just in the pool, naked.
Nothing much happened right there, people were fooling around and making out (nobody had sex in the pool or anything). I went to grab a beer, and a girl I hadn’t even talked to just followed me, and moments later we were laying in the grass and making out.