A locked-up prisoner in the shower submits to his mistress's orders, inserting a metal sound into his urethra. The curved tool probes his prostate, sending jolts of pleasure through his body. His cock, trapped in the cage, strains against the restriction, desperate for release. His moans echo off the tile walls as he edges closer to orgasm, the intense sensation building in his groin. With a final, gritted-teeth push, he triggers a explosive prostate climax, his body shuddering as the hot water washes away the evidence of his forbidden pleasure.