Why does Angela have to run away from her mother to stop herself from crying?

Theo is tending bar but gets distracted explaining chess to Sydelle. Judge Ford observes that the young chess enthusiast must think the Westing game has something to do with chess.

Angela, needing to get away from her domineering mother, runs into the kitchen where she finds Crow. Crow would like to take Angela in her arms and comfort her, but she just gives her a dish towel to wipe her tears. The evening ends without anyone learning more about their clues, or anyone else's.