The Idiot Part 1 Chapter 4 Page 17

absolutely changed. No more of the girlish alternations of timidity and petulance, the adorable naivete, the reveries, the tears, the playfulness... It was an entirely new and hitherto unknown being who now sat and laughed at him, and informed him to his face that she had never had the faintest feeling for him of any kind, except loathing and contempt — contempt which had followed closely upon her sensations of surprise and bewilderment after her first acquaintance with him.

This new woman gave him further to understand that though it was absolutely the same to her whom he married, yet she had decided to prevent this marriage — for no particular reason, but that she chose to do so, and because she wished to amuse herself at his expense for that it was “quite her turn to laugh a little now!”