on chapter 10 part 2: Why did Winston consider the ‘laundry woman’ beautiful?

In the woman he saw the feminie beauty of one who has borne and raised children;

"As he looked at the woman in her characteristic attitude, her thick arms reaching up for the line, her powerful mare-like buttocks protruded, it struck him for the first time that she was beautiful. It had never before occurred to him that the body of a woman of fifty, blown up to monstrous dimensions by childbearing, then hardened, roughened by work till it was coarse in the grain like an over-ripe turnip, could be beautiful. But it was so, and after all, he thought, why not? The solid, contourless body, like a block of granite, and the rasping red skin, bore the same relation to the body of a girl as the rose-hip to the rose. Why should the fruit be held inferior to the flower?"