See the first post in this series.
Herb and Ann Mack — Patric, Connie, Jeffry, Viccey, Nancy.
The Mack surname suggests that Herb may be a distant cousin of Lillian's, however, the only Herb (or Herbert) I can find on my family tree does not fit within this family structure. Lillian's mother, Nannie, was born Nannie Emma Mack. It is possible that this family is of no relation at all.
John and Sara Higgins, John, Deniece, Joseph, Clarice, James
If I had to guess, I would say that this is a family who attended Lillian's church. As a pastor's wife, the names of parishioners (and even visitors) would be important to her. I have not found any relations with the surname of Higgins.
Note: I have chosen to leave Lillian's spellings intact.