I've been thinking about so much of the image play the characters go in this story( How they are perceived VS who they truly are).
How poetic irony plays an interesting role in ther development and breaking points/downfall...
And considering that i enjoy arrogant characters self-destruct out of their egos, and empty victories resulting in loss for the character...
My ideal ending would be Rika actually winning her status quo, keeping her image, her bussiness, and her family. However, Sousuke checks-out of their marriage, and Shiho follows suit. Meaning, even her family now is just that, an image. Sousuke and Shiho can be happy, but without her. The realization that she lost something true in her life is not just to punish her, is her final lie, the lie in her character arc...that she thought she was so broken and had nothing to lose or care, just keep up appearances and "continue to have fun"...
And then it hits her that she had feelings for the family she helped nurture. But it's already too late, she can't keep them close, no safe haven anymore...she breaks in definitive.
The outcome, however, i can't pinpoint. Will she give up and try to redeem herself? Will she divorce Sousuke and run away again? Will she end herself in despair? Her character is so open to interpretation that, who knows?