Chae-Kyung announces she wants a divorce on national TV. The queen goes into labor. Chae-Kyung's grandfather goes into critical condition, but the king commands Shin not to let her know, because she must remain at the palace to support the queen. When the grandfather dies, Cha-Kyung is grateful for Shin's comfort.

I can't tell if the king's plotting makes no sense because I don't get Korean cultural norms or because it only exists to create further tension between Shin and Chae-Kyung. Why is it bad for Chae-Kyung to leave her mother-in-law for her dying grandfather's bedside?