Aguri & Portrait of An Old Geisha

The relationship between the characters in both stories are very similar but the roles are reversed. In "Aguri", Aguri and Okada's relationship is materialistic and sexual. Aguri uses Okada for his money and to fulfill her materialistic needs. In return, Okada manipulates Aguri like a mannequin, where he dresses her up as he desires to fulfill his lust. On the other story "Portrait of An Old Geisha", Yuki and Kosono's relationship is more intellectual with a bit of materialistic involved. I feel Yuki and Kosono are reflections of each other. Kosono never really lived out her youth freely, therefore she kind of leads and manipulates Yuki down a path where he can freely chase his dream.

Question: In "Aguri" after Okada collapse, there's a small eerie part where Aguri is showing her annoyance with Okada and how she has power over him even after he dies. What's the significance of that part?