When Father tries to use guilt to change mothers opposition for his involvement on slavery, it does work in a way. I do not think mother was going to go with it at first, but when father had Adolf Hitler (A.K.A The Fury) over for supper she saw how serious it was, and I think she became almost forced to do it.
The reason mother did not want to do it was because father was working in a concentration camp, and its one of the worst of them, and that meant father was going to kill hundreds of people a day which mother didn’t really think was right. But when the leader of Germany came to their house, I think it was a message to the family of how serious this was and how bad the consequences to the whole family would be if they did not do this. Another reason mother probably did not want to do it was because it meant that their kids would be growing up in a place where they would see people dieing and suffering for there whole life. But when she relizes that it might be healthier for the kids if they do go to Out-With, then not to go and them being the ones who are dying an suffering.