The gymnast's lithe body bends and contorts, her flesh stretching taut as she demonstrates her prowess. Her instructor watches, entranced, his cock hardening in his pants. He can't resist any longer, joining her on the mat, his hands exploring her smooth skin, her toned muscles. He slips his fingers into her pussy, feeling her wetness, then replaces them with his throbbing cock. She gasps, her body tensing as he fills her, but she's eager, her muscles clenching around him as he pounds into her, her flexibility allowing her to take him deeper and deeper, their bodies slick with sweat and lust.