For Better or Worse?

Sweet words from sweeter lips
No longer suffice,
The ice is growing
Unchecked and wild,
The distance that was physical
Has now turned to the heart,
The joys they shared
Are harder apart,
The freedom both knew
Is striving to let loose,
Chafing at imaginary bounds
Still two weighty rings sits sound,
A marriage on verge of break
What happened to "for better or worse", fate?