light bondage sunburn surprising intensity of hand on sunburned bottom

The story I read on another site over a decade ago had a bratty gf poolside trying to incite BF to spank her. There is a challenge that BF cannot get gf to beg for mercy using only his bare hands on her bared backside. BF negotiates for light bondage. BF strips gf naked and ties her face down on chaise lounge, leaves her for an hour or two, then wakes gf with a hand spanking intensified because it is over a sunburned bottom.
Anybody know the story and where to find it?

Although not the story you are looking for, I had one called 'An All-Over Tan' which may tick some boxes.

No, but it sounds like one I would like to read someday. I will check out 'An All Over Tan.' Thanks, BashfulBob