Is Char's assumption that the grand duke is accepting the contract simply so that Char and Sasha can meet more often, even spend the nights occasionally under the same roof? After all, the dense as tungsten Char still believes the grand duke dislikes her. What is weird is that this contract dooms the grand duke not to approach any other women as well. So, it would be 50 years of no romantic relationships, no children, and solid celibacy for the grand duke, as far as Char is concerned.