After Einstein and Mileva married, they had two sons: Hans Albert and Eduard. Einstein’s academic successes and world travel, however, came at a price – he became estranged from his wife. For a while, the couple tried to work out their problems – Einstein even proposed a strange "contract" for living together with Mileva:
The relationship progressed. Einstein became estranged from his wife. The biography reprints a chilling letter from Einstein to his wife, a proposed "contract" in which they could continue to live together under certain conditions. Indeed that was the heading: "Conditions."
A. You will make sure
1. that my clothes and laundry are kept in good order;
2. that I will receive my three meals regularly in my room;
3. that my bedroom and study are kept neat, and especially that my desk is left for my use only.
B. You will renounce all personal relations with me insofar as they are not completely necessary for social reasons…
There’s more, including "you will stop talking to me if I request it." She accepted the conditions. He later wrote to her again to make sure she grasped that this was going to be all-business in the future, and that the "personal aspects must be reduced to a tiny remnant." And he vowed, "In return, I assure you of proper comportment on my part, such as I would exercise to any woman as a stranger."
In another letter:
"When I'm at home, don't look at me or talk to me, and don't complain if I mess around with other women."