Never tell your wife that you got your mother-in-law pregnant. (Rena Fukiishi, JUQ-929)

"Tatsuro-kun, would you please abstain from sex for a month before we leave?" Suddenly, my in-laws asked me this, leaving me confused. What was supposed to be a family hot spring trip turned into a demand to have a child with my wife during the trip. I was bewildered. Following their instructions, I abstained from sex before the trip, but I couldn't help feeling restless... I couldn't control my desires. To quell the pent-up urges, I went to the hot springs, only to mistakenly enter the women's bath, where I witnessed my mother-in-law's alluring bathing posture...