Mine was back in 1997 -- I had known Cindy (my wife, still my GF back then) for about two years and we went with my entire family to an ancestral house on an island to the south about 10 hours drive from Manila and two hours by boat (capital of the Philippines). We were there for a week and because our relationship was just sexually maturing, it was that point where we were just getting sexually intimate. In the boldest sense, it was probably our horniest point. We tried making love in the sea with only our heads above water but we were always within visibility by family members so we just couldn't do penetration without getting too obvious. It was also that time of year there were a lot of jelly fish so that was annoying. It was made worse by the fact there were other relatives with us so my entire family shared sleep space in one huge room. Every person had his or her own little bed.
I think on the fourth night I couldn't hold it any longer. I just had to make out or I'm going to self-destruct. I had tried self-servicing myself earlier but Mary Palmer didn't help either. That night was now or never. Problem was in the room was Cindy, Dad, Mom, sister 1, sister 2, Grandma, aunt 1, aunt 2 and my future mother in law. Our little one-person beds were about two-three feet away from each other.
My ninja skills were finally going to be put to the test. At the dead of night when all you could hear are crickets and huge wall lizards screwing each other, I very quietly and gently snuck under Cindy's blanket. My footsteps were almost inaudible but creaked nonetheless. I was so scared about us getting caught but my horniness level knew NO FEAR. We started making out trying not to make any sound at all, although the little bed squeaked each time we connected (missionary was all I knew then). In less than 10 minutes it was over -- both of us had climaxed very silently and I crept back into my own bed. Mission impossible? Mission accomplished.
Up to this day my wife and I wonder if anybody else knew what went on that evening as I know for a fact that my family is a family of very light sleepers. I know one of my sisters knew but she wouldn't tell me if anybody else knew. My mother-in-law though wasn't particularly happy the following morning -- and throughout the day I remember she would look at me with a mean grin.
Okay enough of me, what's your story?