"she always makes me seem as the bad guy"
I mean, we're reading a translation, and there's a question of what the Japanese literally said.
Translator says "the original text is gendered, and specifically refers to a wife, yes."
The question wasn't about the "wife" part but rather about the "bad guy" part.
But yes, I was even initially going to comment on this customer myself, but in the end decided not to since no one else had brought it up and because of how out of place an openly lesbian grandma seemed considering the story so far. Certainly looks like a woman indeed, though...