I Can't Tell My Wife That I Impregnated Her Mother-in-law... I Was So Excited That I Forgot About Myself And Cum All Over Myself On A 2-day/1-night Hot Spring Trip. - Iroha Morinaga

'Kyo-kun, isn't it about time you showed me a grandchild?' I couldn't hide my shock at my father-in-law's words. What was supposed to be a fun family hot spring trip turned into a request to make a baby with my wife... After a month of abstinence as my father-in-law instructed, the day of the hot spring trip arrived, but my wife refused to conceive. Trying to distract myself from my frustration, I wandered around the inn and accidentally caught sight of my mother-in-law bathing...