Barbara Healy is the unstable, alcoholic, abusive biological mother of Mark and David Healy. When she moves to Minnesota, David doesn't want to move with her, and after Roseanne discovers what kind of mother she is, she allows David to live with the Conners.
Along with her husband, treated Mark and David like crap. After seeing how she acted, Roseanne allowed David to move into their home and treated him like family from the beginning. According to Mark, Barbara and her husband kicked him out when he was 16. They had never bothered to even call them. She and her husband didn't attend David's wedding.