While heading to a hot spring inn with his wife and her mom friend couple, the husband accidentally ends up in the mixed bath with that mom friend. However, knowing that the mom friend hasn't noticed him, he secretly jerks off using her naked body as material. But when he gets caught, instead of being angry, the mom friend is pleased to be seen as a woman and wants to watch him jerk off. Eventually, unable to contain her excitement, the mom friend reaches out for his dick…
