Seriously though, I have no idea what your mom’s prob is, but I’ll bet she and my mom would get along swimmingly. I used to pluck my eyebrows so intensely that they were basically nonexistent because she would put her fingers up above her eyes and wiggle them around and yell “FUZZY CATERPILLAR EYEBROWS!” at me when I didn’t pluck them.
She also gave my sister a hard time when she stopped shaving her pits at one point.
BASICALLY, there’s probably no avoiding it. At least from my experience, trying to get people who are stuck in their ways (especially mothers) to make a disconnect from body hair being “unhygienic” can be a lost cause. Not in all cases, but most. Worth a try, though.
If you’ve brought it up with her and she’s still being a butt about it, take pleasure in the fact that it obviously annoys her - because there’s absolutely NOTHING she can do about it.
It’s your body - do what you want. <3