Gibo to no Yuuwaku Doukyo Seikatsu ~Tsuma no Haha wa, Gibo to wa Yobenai Bijukujo Deshita~ The Motion Anime

The main character met Remy when he was completely drunk. They had a quick romance and soon they got married after the heroine's pregnancy was discovered. After the birth of their child, their life became measured and incredibly calm. Remi's mother, Shino-san, came to help with the child's care. Some time later, Remi was taken to the hospital with a child, and our hero was left alone with a very attractive milf Shino...