They parked in the parking lot and walked towards the beach. Along the path there was a small rustic building with three changing rooms and an outdoor rinse off shower. The walls and doors did not go to the floor, so you could easily see when a changing room was occupied or vacant. She went into the first changing room and closed the door. The next one was occupied, so he went into the last stall. He changed quickly, carefully positioning his cock and balls into the small, tight bathing suit so that they formed a nondescript, modest bulge. When he was done and stepped out he could see her feet still under the door, so he waited outside. A few moments later she opened the door, pulled him into her changing room, and closed the door. Without speaking, she dropped to her knees, pulled down the front of his suit, and sucked his cock into her mouth. She grabbed his ass with both hands and worked up and down his shaft as fast and as deep as she could. She looked up at him as she worked, watching a smile spread across his face as his eyes went in and out of focus. Due to the gap between the floor and the bottom of the door, it was almost certain that other people outside could see his feet standing and her knees on the floor in front of him. It didn’t take long before he was fully erect. She continued a bit more until his shaft felt extra hard. It was clear he was getting close. She stopped sucking just in time, pushed his erection up towards his left hip bone, and raised his swim suit back up. Instead of a center bulge, his hard shaft now stretched up to one side, barely contained by the narrowing waist band across his hip. He looked at her in surprise, and was fearful of how obvious his condition would appear to others. She stood up, took his hand, and led him out of the changing room and down the path towards the beach.