A critical element of deibus is their lack of self awareness, this mother just seems like a typical kind hearted if stupid and incompetent reimu
Parent Reimu:
"Yuguuuuu... Zorry, Bariza... Deibu'z zo zorrryyyyy... Deibu iz a good-for-nothing yugguriiii... She made Bariza go oud hunding alone... And in the end, Deibu couldn't even zave the liddle one... She ade mother and father... and big zizderz... She even ade Bariza... yuguuuu-!
Deibu! Iz zgum! And zdubid! A worthlezz drash yugguri who gan'd mage anyone dage id eazy!!! Uwaaaaaaaan!!!!!"
"...!!...!!"
Parent Reimu: "...?!"