It's true, the hug can't last forever, especially not as tight as it is. Envy does wait until the hysteric, quiet laughter has subsided and his eyes have quit leaking before lifting his head, leaning back enough to be able to get a look down at Wrath.

He does leave his arms loosely around his brother's shoulders, though.

"Al told me you got out of the city...didn't know you got automail, though."

He's quietly relieved about that too, even if it's a little weird that Wrath hadn't managed to grow any new ones back. It must have been something weird about the human limbs being taken back.