Despite protesting, "I'm a married woman!" against the trainer's sexual harassment lessons, she experiences a climax unlike any she's ever felt with his muscle piston! The back-and-forth thrusts are particularly intense, giving her a sensation like her uterus is being ripped apart, causing her to sweat and cum uncontrollably, reaching a peak of spasms! The busty wife, who never reached such heights with her husband, repeatedly orgasms, her vagina filled with semen (protein) from someone other than her husband, leading to a breakdown of her rationality! Drowning in pleasure, Waka continues to go to the gym to be "raped" by the trainer, ignoring her husband's worried thoughts.