Lyric discussion by -Amz- 

Cover art for I'm Not Ready to Forgive You lyrics by Right Away, Great Captain!

'but smiling back behind you stood the sum, for departure' i think that's when he sees his brother coming to greet him too. & at the sight of his wife he's fallen back in love with her but then he sees the brother & feels all the betrayal he felt to begin with & realises he's not over it & isn't ready to forgive her.