Ranma 1/2 - How should Akane/Nabiki/Kasumi's mother be tagged?

It was recently agreed that Rosalina's Mother should be tagged with that name, since she has no canon name.

I wanted to add a tag for the Tendou's mother from Ranma 1/2, since I've uploaded some fanart of her here(post #10977315 & post #10927979), but since she's the mother of 3 important characters I was unsure on what to title the tag. Should the tag be [x]'s_mother, or simply Mrs._Tendou?

Missus appears to be standard, if we go by the precedent set by Mrs. Kujo and Bikini (who used to be tagged as Mrs. Briefs before her official name was revealed). On the other hand, there's an argument to be made that Mrs. Kujo should be renamed jolyne_cujoh's_mother, so this precedent would hold no water anymore.

Given her husband, Tendou Souun, is also a character and one who is present at the start of the series, I'd be inclined to go with the Mrs. naming route instead of the mother naming route.