Random Riddle: 3-1-2014

I saw the happy pair pass by,
Newly wed midst joy and acclamation,
One simple English word thought I,
Exactly summed the situation.
But years have passed and love is slain,
And now they go divergent ways,
For they have been divorced.
Again, one word quite fits the case.
The second word is like the first,
Two central letters just reversed.
 
Riddle