Why does George get angry with lennie after they arrive in the clearing

As George pats his pocket, where the work cards are kept, he notices that Lennie has something in his pocket as well: a dead mouse. Lennie explains that he likes to pet the mouse’s soft fur as he walks. George takes the mouse from Lennie and throws it into the bushes. He then admonishes Lennie for his behavior, warning him not to behave badly, as he has done so often in the past, and ordering him not to say a word when they meet the boss at the new ranch. He reminds Lennie of past misadventures, specifically an episode in the town of Weed in which Lennie assaulted a woman in a red dress because he thought her dress was pretty and wanted to feel it. The woman accused Lennie of attempting to rape her and George and Lennie had to run for their lives out of town. While recounting this incident, George complains that if he didn’t have to take care of Lennie he could live a normal life: “I could live so easy and maybe have a girl” (7).