When Jackie Lynn’s niece gave birth to a baby who was addicted to heroin, Ms. Lynn sprang into action.She thought she had turned the page on parenting, after raising two children and living alone for 14 years. But while her niece pursued treatment, Ms. Lynn moved to Oregon, from Washington State, in 2009 to care for the baby and his four siblings. Her job as a manager became untenable, so she took a pay cut — even as her expenses mounted.“The kids were there. They needed me,” Ms. Lynn, now 67, said. “It’s not like you can choose to walk …
