*Infinity War spoiler* contains what happened in that horrible scene on Titan with Spiderman after the snap. Oneshot
"Mr. Stark," Tony whipped around to see Peter, in his new iron-costume, gripping his stomach. Tony knew what had just happened wasn't good, and now he and Peter were the only ones on this empty planet. "I don't feel so good."
The rest of the team (as well as half the universe, Tony thought) had just disintegrated with dust and he began crying as he saw Peter fall on the ground. Tony dropped down with him, openly weeping as the Spiderman/the boy he called his son layed on the ground.
"Kid." Were the only words he could say.
"I don't want to go, Mr. Stark." Peter cried. Tony gripped his hand. "I don't want to go…" Tony closed his eyes and Tony's hand suddenly fell. He opened his eyes and nothing was laying there. Tony, leader of the Avengers, Iron Man himself, fell on the ground in agony. He cried out in the wasteland known as Titan. There was nothing else here. Half the universe was just gone. Who knows if Pepper is still alive? Oh lord, Pepper. Now there was no way out. He wanted to blame everything, anything. Peter Quill, who ruined their only chance. But Peter… and Gamora, okay not him. Scarlet Witch, who refused to destroy the Mind Stone. Which held her lover, Vision. Himself. The only one he could blame was himself.
Thanks for reading. I am so, so sorry for bringing this up again. May the Lord bless you with tissues.