The Last Song Lyrics

Lyric discussion by Razza 

Cover art for The Last Song lyrics by Rihanna

Isn't it "but baby won't be hearin' it when I'm gone" Not "We'll be hearin it when I'm gone" cuz it's her song and when he's left her, he won't hear it anymore to complain about?

I mean I know it definitely sounds like "We'll be hearin it when I'm gone" but I don't understand what that's implying in reference to the verse?