Hiyakeato no Musume to Fuufu ni natta Sono Yoru, Gibo mo Ukkari Haramasete shimau Natsu

日焼け跡の娘と夫婦になったその夜、義母もうっかり孕ませてしまう夏, After Marrying her tanned Daughter, I accidentally got my Mother-in-law Pregnant one Summer Night