Wendy/Maggie's mother Sarah
owns the Home Port Restaurant
https:// vineyardgazette.com/news/2011/05/26/home-port-puts-menu-where-mouth
This is on the wall.
Her family background
https:// www.nytimes.com/1994/10/30/style/weddings-bruce-reedy-sarah-t-guinan-and-robert-h-nixon.html