Einsteins actions are understandable to any one who understands the nature of the marriage contract. Since the beginning of the concept, marriage has always and remains, a business deal.

Love, for millennia was not a factor in these contracts any fool should realise that a loving relationship requires no contract. Einstein, I think we would all agree was no fool. He just renegotiated his contract.

In any contract, as long as all parties concerned agree to the terms, regardless of the terms of anyone Else's contract, is fair. Einstein found that the contract as written by others did not suit his predispositions and interfered with his work.