Wait omg they are????????????
This manga was published four years ago, and I couldn't find any news (in English) about a child, so I think it was unsuccessful...
Unfortunately, I did find this. They separated just a few weeks ago, it seems.
https://www.japantimes.co.jp/news/2017/12/28/national/social-issues/japans-first-official-sex-couple-splits-actress-koyuki-higashi-entrepreneur-hiroko-masuhara-announce-separation/
Oh no... That's really unfortunate. ╥﹏╥
Omg I'm soo sad right now （/TДT)/
Awww they're the women that got married at Disney Tokyo. That's so adorable. I hope they can have a child!