EDIT: This is for the program, so we want both first names.
She has it:
Dad and Stepmom Last Name
Stepdad Last name and Mom last name
The second couple has two different last names, the first one is married. I have thoughts but I'm not 100% on etiquette here! I think you are not supposed to separate the man from his last name?
She doesn't have any mr. and mrs. on there, but there also aren't any traditional people. Should she still do it? It's the program, not the invites.