Marianne Sinisi’s early expectations that if she could get her son Shawn into treatment, his addiction could be “fixed” had given way to dismay after meeting with one disappointment after another. But she wasn’t ready to give up. She turned to lawyer Andrew Shubin, who had handled lawsuits against Penn State for several victims of Jerry Sandusky. He talked with Shawn, and told Marianne he would take the case. But Marianne told him she wasn’t looking for a drawn-out legal battle. What she asked for was more basic: Help for her son. It turns out, such requests weren’t foreign to Penn State, whic…