After getting married, my wife's parents, who had been estranged, invited me to a hot spring trip. The trip is ostensibly without family water, but in reality it is a child-making trip in which my father-in-law ordered me to live abstinently for a month before the trip. Just passing by my mother-in-law after the bath was the limit of my patience so much that I got an erection. However, my wife is absorbed in the hot springs and does not let me hug her at all. I had to spend a frustrating night, and when I was taking a walk in the hall to calm my sexual desire, I happened to witness my mother-in-law taking a bath.