This happened over a year ago and I’m still shocked at how quickly things went from 0 to 100….
My wife, Abby, and I (Mark) decided to go camping and invited her brother Josh and his girlfriend Katie. There is a pretty big age gap between my wife and her (younger) brother, who also happens to be a few years older than Katie. This leaves me as the oldest of the group at 35, and Katie as the youngest, at 24. Katie is a 5’5” blonde with blue eyes; probably 115lbs. She’s definitely a good looking girl, with pale skin and a killer smile. What her small B cups lack, she makes up for with a nice well shaped butt. Not big, but a nice, well shaped, tight ass. Myself, I’m 6ft, 220lbs, with a big enough build to pass for working out.
Over the years I took a peak or two while Katie was in a bikini and we joke with each other a bit but I always took it as friendly banter. I could point to no flirting on a level that could trigger what was about to happen.