Barbara and her husband came into town for their daughter's wedding to Callie Torres. While she was there, she doted over her granddaughter, showing off the clothes she'd bought for her.
She is married to Daniel Robbins.
She is the mother of Arizona Robbins and Timothy Robbins and the grandmother of Sofia Robbin Sloan Torres. When she found out about her daughter's sexuality, she accepted it, as she was not surprised. From what it seems, she is also a very enthusiastic grandmother, as she brought Sofia baby clothes.