https://forums.mangadex.org/threads...ch-56-your-one-man-show.2102925/post-24775473
My post from ch.56 by referencing ch.34; to another post:
Hitoyoshi and Riko's mother being a potential vampire, "jokingly" by their father about them having vampire blood; as he talks to Yuki with them at Hitoyoshi's place
Last portion of ch.34 also shows their mother, talking to their father/her husband at the end, regarding Hitoyoshi and Yuki; and as Hitoyoshi "mentioned" how their father prefers to joke around about certain matters or whatnot
(which turns out to be an actual possibility that their mother is a vampire herself and that both their children do have vampire blood in them)
Finally, their mother's eyes are shown for the first time here (everything else matches up her traits that was revealed in ch.34)