The second wedding invitation of a widow should be issued in the name of her parents or nearest living relatives. She uses her own first name with the surname of the deceased husband. Here is the correct form:

Mr. and Mrs. Neal Perry
request the honor of your presence
at the marriage of their daughter
Mrs. Mary Beth Johansen
to
Mr. Paul Bowman
on Saturday, October the twelfth
at seven o'clock
Our Lady of Good Voyage

It may be that the woman who is to be married for the second time has no near relatives to serve as hosts for her. Her invitations may be like this:

The honor of your presence is requested
at the marriage of
Mrs. Candice Eve
and
Mr. David Walker
on Sunday, June the eighteenth
at one o'clock
at the residence of
Mr. and Mrs. Mitchell Romney
Sixteen Ocean Avenue