Family question about Mary Wilson

In "Dreamgirl", Mary states that at some point, she was sent to live at her Aunt I.V. and Uncle John's house. Later, Johnnie Maye is back on scene, and she resumes life with her mother.

Does anyone know if she kept in contact with her Aunt and Uncle, or whatever became of them? She really makes no further mention of them, and throughout the 60s, 70s, and 80s, you can find lots of pictures with Mary and JM, but none with her "adoptive" family.

I.V. is pictured in SUPREME FAITH among Mary’s family members at her Vegas wedding to Pedro.

In SUPREME FAITH, she mentions that the group had a successful 1976 engagement at the Roostertail in Detroit. She includes a diary entry where she mentions that she was having dinner at her Aunt I.V.'s house almost every day, and had also gone to visit "Daddy" [[her uncle) in the old neighborhood.