Husband-n-wife

Marriage is announced;
They are declared as husband-n-wife.
Without each other;
They do not remain as husband-n-wife.
Baby cannot happen;
Just with husband or wife.
For birth of a baby;
Mandatory are husband-n-wife.
Marriage ends; relationship ceases;
Separated is husband-n-wife.
They get a new name, divorcees; ex-husband; ex-wife;
No longer are they husband-n-wife.
Death renames them; Widow of husband; widower of wife.
They become late husband and late wife.
Marriage is alive;
Existing is the couple husband-n-wife.
Making this institution functional;
What gets more attractive is this pair;
Husband-n-wife.