So . . . I saw a prompt on Tumblr. 'Nuff said.
It was the end. The end of everything. Manhattan was nothing but a pile of smoking rubble. The Avengers had all gone MIA except for Hawkeye and Black Widow. They stood in what used to be Stark Tower while bombs fell from the sky, darkening the crumbled horizon.
"Hey." Said Clint gently as he folded Natasha into his arms. "It's okay. We'll be okay."
"We won't be okay, Clint. I-" she buried her face in his shoulder, silent tears flowing down her face. "I can never make things right."
"Yes, you can." Clint started to rock her back and forth, as if slow dancing. Softly, gently, almost whispering, he started to sing, his lips near her ear. They both closed their eyes.
"You are my sunshine,
My only sunshine,"
A building collapsed a little way down the street. Scraps of paper fluttered around.
"You make me happy,
When skies are grey,"
A storm cloud rumbled in the distance. The wind picked up.
"You'll never know, dear,"
She wrapped her arms around him and held on tight. His voice broke, choked by tears.
"How much I love you,"
The high pitched whine of a falling bomb could be heard overhead.
"I love you." Natasha said quietly, and Clint nodded. That nod said more than a thousand words ever could.
"Please don't take,
My sunshine a-"
A bomb detonated only a few feet to their left.
Clint never finished his song.