This is why I tend not to shoot in aperture priority or shutter priority modes. I tend to ignore the settings the camera is making for itself and get unpredictable results.
In this case I was fairly close up to the couple so I wanted a reasonable depth of field. I didn’t want to risk the young lady being out of focus, so I popped the aperture up to 9 and let the shutter speed take care of itself. Other photos I’d been taking around this time had a shutter speed of around 100 or so, and I wasn’t particularly worried.
Imagine my surprise when I looked at the EXIF data and found 1/40 shutter speed. Thank heavens they were still. These two have so much energy that getting them to stay motionless but still relaxed for a few moments is a bit of a challenge, but I was helped by having her balance on a railroad track.
It’s still not quite as sharp as I was hoping for, but I compensated by softening the image even more, adding some warm lighting effects, and sharpening up the eyes. Rounded off by adding some skin smoothing and the finished result is almost like I planned it this way!