My father-in-law invites all four of us on a family hot spring trip. It looks like a fun getaway, but its real purpose is to pressure my wife and me into making a baby. I have been abstaining for our pregnancy efforts, yet a petty argument puts my wife in such a bad mood that sex is off the table. With no idea how to contain all that pent-up desire, I roam the inn in frustration—until I happen to catch sight of my mother-in-law bathing...