Agatha Christie said this quote
“ ... Good gracious, Jerry, you'll probably have to marry the girl.'Joanna was half serious, half laughing.It was at that moment that I made a very important discovery.'Damn it all,' I said. 'I don't mind if I do. In fact - I should like it.'A very funny expression came over Joanna's face. She got up and said dryly, as she went toward the door, 'Yes, I've known that for some time...'She left me standing, glass in hand, aghast at my new discovery. ”