"Okay-" She was stopped mid reaction, as she had been expecting a show of illusion, but what she got was much harsher. From his point of view. The first bit was confusing, but one thing that wasn't was Thanos. She had a name before she realized it. Thanos and the Black Order. She was only able to get a grip on one thing as those memories flooded past her. Thanos was dangerous.
Then everything seemed to slow down. And she was- no he was- standing among the dead. The feeling that time had come to an end, when he had needed so much more. He couldn't save himself. It was in that moment that she could not hold back her own emotions. And tears ran down her face unchecked. One last deed. Save Thor. Then she felt it. The end. His death.
Shannon felt that sense of loss all over again. And now she knew it's cause. She doubled over her lap and a sound unlike one she'd ever made in her life, the wail of absolute loss, tore from her throat. It went unnoticed by her that everything caught fire in that little clearing. First the grass turned black, then the trees went up like matchsticks. Even the rock he'd pulled at him at first began to burn, as she sobbed.