Morrò, ma prima in grazia (Un Ballo in Maschera)

At the request of an anonymous commenter on LJ, here is "Morrò, ma prima in grazia," Amelia's aria from Verdi's Un Ballo in Maschera. Thanks to the commenters at linguaphiles for help with an idiom.

Renato suspects his wife Amelia of infidelity and resolves to kill her. She begs for a last moment with her son.

( now that the last of my fleeting hours has come )