まひろ→みはり、ときてたから「む」始まりかと思ったら、まつりだった。
ま　「ま」ひろ
つ
り　みは「り」
なので、◯つ◯という名前の隠し子がいる！のかもしれない

After Mahiro->Mihari, I thought her name would start with "mu", but it turned out to be Matsuri.
Ma from "Ma"hiro
Tsu
Ri from Miha"ri"
Therefore, she has a secret child named something-tsu-something! Maybe.