on chapter 7 part 2: Describe the event that prompted Winston’s mother’s disappearance.

"One day a chocolate-ration was issued. There had been no such issue for weeks or months past. He remembered quite clearly that precious little morsel of chocolate. It was a two-ounce slab (they still talked about ounces in those days) between the three of them. It was obvious that it ought to be divided into three equal parts. Suddenly, as though he were listening to somebody else, Winston heard himself demanding in a loud booming voice that he should be given the whole piece. His mother told him not to be greedy. There was a long, nagging argument that went round and round, with shouts, whines, tears, remonstrances, bargainings. His tiny sister, clinging to her mother with both hands, exactly like a baby monkey, sat looking over her shoulder at him with large, mournful eyes. In the end his mother broke off three-quarters of the chocolate and gave it to Winston, giving the other quarter to his sister. The little girl took hold of it and looked at it dully, perhaps not knowing what it was. Winston stood watching her for a moment. Then with a sudden swift spring he had snatched the piece of chocolate out of his sister's hand and was fleeing for the door."