3425 — Cuckolded by My Gym Trainer: Married MORITA MIYU Works Up a Very Different Kind of Sweat

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After her beloved husband remarks that she may have gained some weight, married Miyu decides to slim down with help from a gym trainer. The sessions begin as healthy exercise, but the trainer keeps touching her until her breasts are exposed and he starts stroking his cock in front of her. Watching it makes Miyu unexpectedly aroused. Sensing her desire, he suddenly pulls down her panties and shoves his hard cock inside from behind. Though confused at first, she cannot stop moaning from the pleasure. Soon there is no turning back: intoxicated by the guilt of betraying her husband, Miyu sinks deeper and deeper into an illicit affair with her trainer.