Katherine (Grace Park) and movie star Shanice Williamson (guest star Nikiva Dionne), have arranged a playdate for their kids while Shanice is in town. Katherine and Shanice confront the fact that when they were closer, Katherine wasn't quite ready to accept her budding feelings -- and now it seems their moment has passed. From 'A Million Little Things' season 4, episode 18, 'slipping.' Watch 'A Million Little Things' WEDNESDAYS 10/9c on ABC. Stream on Hulu.