the privilege of loving you (слэш)

“Why won’t you let me touch you?”
It’s a desperate plea, half-shouted and half-whispered, Steve’s voice cracking at the end. Tony stops in his tracks, halfway to the stairs. He doesn’t dare to turn back, and he really doesn’t want to fight, or to leave, to spend the last month of his life away from his husband and their son. But Steve can’t know, can he?
-x-
Or: Tony has palladium poisoning, but he doesn't tell Steve and Peter