My wife's sister, had left her husband and gotten herself a house on her own. We went by to see her new place, there was a truck and trailer with a lawnmower on it in the driveway but no one outside. The grass was freshly mowed so not thinking anything of it we walked up to the door to knock. As my wife raised her hand to knock we were greeted by the sound of an ass being smacked and deep grunts of her sister, paying for her yard work, no doubt. We eased out of the driveway and went to visit more of her family. The rest of the day I made fun of the situation, even to the sister that was being fucked. My wife laughed right along to begin with but the more it was talked about the less she did. On our two hour trip home, I brought it up again and she seemed perturbed. She blurted out "just so you know, I got caught like that before." I let it go, as to not ******** her off and I'm almost glad that I did. I would like to know what happened but the situations that I imagine may be alot better that what actually took place. In my head, I have several possibilities of who was fucking her and who caught her and all the senerios give me a stir. I'll ask her one day though, whenever I run out of ideas of how it happened.