Lord Larousse knew that he could do nothing to change that. In fact, he would be selfish to expect Jeanne to take care of him and his son even though she was just his sister-in-law.
He got reincarnated and they got transmigrated I think
The three kids followed the couple to their house. It was just any normal house any villagers could build. The couple cultivated some land to plant root crops and fruits. They even have some Black Chicken, that type of chicken where everything about it is black. From its outer appearance to its inner looks.