Complex sentence: Each decision they make is carefully executed so that they can remain in their delicate balance of passivity, yet one day the couple finally decides to go see the puppet theater in Osaka with Misako's father and his mistress Ohisa out of filial piety.
Split into simpler sentences: Each decision they make is carefully executed so that they can remain in their delicate balance of passivity. But one day the couple decides to go see the puppet theater in Osaka with Misako's father and his mistress Ohisa, out of filial piety.