My wife and I were still fairly newly married, just a few months past our second anniversary, and we were spending a warm August weekend at her parent's house along with her younger brother and sister. After a late dinner, all six of us went outside for a swim in the pool. It was just getting dark on a moonless night and the cool water felt refreshing after the heat of the day.
After about two hours of swimming, everyone else drifted back into the house. First her parents followed in about half an hour by her brother and sister. We were alone in the pool in the dark. My father-in-law was a frugal man and had the pool lights and yard lights on timers that clicked off not long after the younger ones went in. This left only the light shining out through the house windows to light our swim.
I was feeling frisky and swam over to my young wife, admiring what I could see of her figure through the water and in the darkness. She is short in stature, about 5-foot-3, and in those days she was only a couple of pounds overweight. But the extra weight was in all the right places. She was wearing her red, flowery bikini over her well-shaped C-cup breasts and cute, round bottom. She thinks her behind is too big, but I think it's the cutest one that I've ever seen.