I was sunning by the pool in a semi modest bikini when the young man (18) from down the street showed up to do the yard work. He went into the shed where the mower and tools are but didn't come back right away. I was worried he got hurt on something so went over and opened the door – there he was on his knees with his pants and underwear down furiously jerking off. He quickly tried to cover up apologizing the whole time and obviously VERY embarrassed. I just pulled my top up and exposed my breasts and said "hurry up and finish and get to the yard work." It didn't take long for him to recover and took even less time to shoot his load. I went back to sunning and he went to work on the yard. We never mentioned it.
Source: reddit.com/r/sexystories/comments/2lzdep/caught_yard_boy_jerking_off_f34