How does gregor try to stop grete from removing the picture of the woman from his room?

In Franz Kafka's Metamorphosis, the picture of Venus in Furs hanging from the wall of Gregor symbolizes the past that he holds, desiring wealth and beauty. When her sister and mother try to remove the objects from the room, Gregor stops her sister  removing the picture by clinging to it. The picture is his last destination for his past like a drug for a drug-addict. It is a last element from his life before the transformation.