The correct answer is Friedrich Frobel
He was a German pedagogue who is credited with creating the foundation for modern education. He recognized that every child has certain capabilities and their unique needs which are different from other children which enabled him to develop theories of education. He actually created the word kindergarten as a coinword used in his works.
The correct answer is there was no reason.
There was actually a reason but it was never stated publicly and it was because of all the affairs that occurred between them. They went to France to live outside of it all and not deal with repercussions and save their marriage.