My mother-in-law, Rena, came to Tokyo to take care of my wife, who is about to give birth. My wife is a bit nervous, and she takes out her daily frustrations on me, eventually banning me from masturbating. Unable to contain my frustration, I peek at my mother-in-law taking a shower from the dressing room. Rena, noticing this, feels sorry for me for being so harsh to her, and not only does she embrace me tenderly, but she also gently touches my crotch, which is on the verge of breaking...