If the bride’s parents are deceased and the invitation is issued by an older married brother or sister:

Mr. and Mrs. Robert David Thornton
request the honour of your presence
at the marriage of his (her) sister
etc.

Other relatives such as grandparents, aunt or uncle may also issue the invitations if the bride’s parents are deceased.  They would use the same formats as above with the proper relationship changes.

If the bride and groom issue their own invitations, the conventional wording would be:

Miss Anne Haley Harper
and
Mr. Michael Samuel Lee
request the honour of your presence
at their marriage
etc.

The proper way to word an invitation when the bride’s parents are divorced is to list the names of the bride’s parents at the top of the invitation.  Her mother’s name is on the first line and her father’s name is on the line beneath it.  The lines are not separated by “and.”

If the bride’s mother has not remarried, she uses “Mrs.” followed by her first name, maiden name, and married name.

Mrs. Sally Jones Harper

A divorced father who issues the invitation uses the conventional form:

Mr. Matthew Ellis Harper

If the grooms family issues the invitations:

Mr. and Mrs. Jonathan Allen Lee
request the honour of your presence
at the marriage of
Miss Anne Haley Harper
to their son
Mr. Michael Samuel Lee
etc.