You Are My Sunshine

You Are My Sunshine, my only sunshine.
You make me happy when skies are gray.
You'll never know, dear, how much I love you.
Please don't take my sunshine away.

Disclaimer: Don't own the boys, the song, basically anything except the plot. Prompt from ATF anon.
Warnings: Murder
Pairings: Zalex, Alex/John O'Callaghan