"Hey Tsubasa... what about kids?" My father-in-law asked with a sullen look on his face, and I didn't know how to respond. My wife and I want children, but we both work and can't put the effort into trying to have a baby. Then my father-in-law suggested we go on a family hot spring trip. The goal was to have a baby on our trip, and on top of that, he'd make us abstain from sex for a month... But my wife was too excited on the trip to have a baby. I was thinking about taking a bath to calm down, when by chance I witnessed my mother-in-law having a seductive bath...