STOCKTON — Mayor Michael Tubbs and his wife, Anna Malaika Nti-Asare-Tubbs, announced the birth of their first child on Saturday, a son born at 9:04 a.m.The third member of Stockton’s first family has been named Michael Malakai Tubbs Jr., according to social media posted by the mayor on Saturday.“Mother and baby are healthy and are supernovas,” Tubbs wrote.