Tether (слэш)

Trapped in a flying doughnut with Stephen Strange, Tony Stark is desperately trying to think of a way to save the universe, keep Peter safe, and not reveal a secret he’s been keeping since he was a child. The answer is simple. Destroy the Time Stone. No Infinity Stone, no end of life as they know it.
Things are never that easy.
Inadvertently creating a time loop, Stephen is stuck bouncing between the past and the present on the Q-Ship, tethered to a child as he watches him grow up.
‘Why do you always come when I’m at my worst?’ Tony muttered under his breath, ripping his hands free.
‘You love this, don’t you. Seeing me at my lowest! Afghanistan! My parents dying, boarding school. Poor Tony Stark, the psychotic wreck!’ Tony tried to get to his feet, shrugging Strange and the Cloak off him, feeling validated when he saw the sting of rejection in Stephen’s eyes. Good, he wanted him to hurt, wanted him to stop thinking Tony was weak.
The story rating is for the last chapter and some swear words sprinkled in.

The Major Character Death warning is not Tony Stark or Stephen Strange.