Avengers end game

You,Steve,Natasha and Scott go to Tony’s cabin and he comes to the door and Scott and Steve explain their plan to time travel to Tony but he thinks it’s unrealistic Tony:you can’t do that, no matter who you want to do it for Steve: would you do it for him/her? Tony looks at you and your standing down and afraid and he feels a small amount of guilt Natasha: he lost his sister in the blip… she was all he had