Lennie accidentally kills Curley's Wife out of anger due to her not quieting down.
" 'George gonna say I done a bad thing. He ain't gonna let me tend no rabbits.' " (91)
More on the other screen >> (still part of section 4)
Lennie is explaining to George the first quote that he only found the mouse dead, and George sees through Lennie in the second quote that he's pet the mouse so hard it died and will get him a puppy to pet harder with whenever he gets the chance. The strength Lennie cannot control is shown by him killing the mouse, and George's response is to just give Lennie something more tough to pet. There is no real consequence for Lennie's actions and George's response as of now, but small untreated actions
" 'Now listen. We gotta tell the guys. They got bring him in, I guess. They ain't no way out. Maybe they won't hurt 'im.' " (95)
George's response for Lennie to stop the continuous rampage by Curley was to "Get him", which leads to Lennie grabbing Curley's fist and crushing it with his strength. George never treated Lennie's actions in the past, which could have been prevented if George found an alternative way to stop this, but instead lets Lennie fight back, even though he never wanted to fight or harm anyone in the process. While the action was much more severe, the consequences are still not much for George and Lennie, but what Lennie does next affects Himself, George, and Everyone on the ranch.
George responds to Lennie's final action by putting Lennie down without any vein.
"And George raised the gun and steadied it, and he brought the muzzle of it close to the back of Lennie's head." (106)
" 'Don't you go yellin', ' he said, and he shook her; and her body flopped like a fish. And then she was still, for Lennie had broken her neck." (91)
Lennie killed Curley's Wife due to Lennie's worried thinking that George would be mad if she'd scream too loud. George has seen Lennie's inability to control his strength but chooses to leave Lennie unattended, which leads to Himself and Candy having to deal with Lennie's choices, and Curley's Wife dead. George attempts to respond to Lennie's action by telling Candy to tell the news. As everyone hunts down Lennie, George gives one more talk to Lennie before saying goodbye...
The actions and Consequences by Lennie caused outrage by everyone in the ranch. Georges response to Lennie after George told everyone that Lennie killed Curley's wife, which lead everyone wanting to lynch him. George relaxes Lennie with their dream to handle the rabbits, then shooting him where he wouldn't feel any pain. While it's clear later on that Lennie's untreated actions lead to Curley's Wife and himself dead, George failed to prevent any of these from happening, where George Neglects Lennie killing a mouse by accident, to him killing Curley's Wife by accident.