@encrypted12345 -- The questions are easily answered, since Sayaka's divorce from her husband is what kicks off what I laughingly call the plot, and Sumika is shown to be married to the elderly fellow Sayaka was skyping with earlier. There's no magic or weird science involved here.
I need more of this couple? I love Sayaka x Yuri, I don't reaally wan't one more in their relationship, but I wouldn't really mind some casual appearances.
Thank you so much for the chapter, I loved it <3<3<3<3<3<3<3