She stepped in

We started out together on the same old road 
With you by my side we had places to go 
We lived our lives like it would never end 
But at the end of the road is where the heartaches begin 

( Chorus)
She stepped in where  you stepped out 
She told me things that you left out 
She took me higher than the highest clouds 
She stepped in where you stepped out 

You left me standing out in the cold 
Wide open for the taking and no place to go 
Then she came along like a thief in the night 
Took the love you left alone 
and made everything right 

(Chorus)

Progressive Southern rock, male. A lower key with a deeper vocal more of a swampy sound