Personally, I do find it a bit gross but honestly if she would have asked me (because she had torn a nail or they were getting in her way) I would have 100% said of course, use them. She always has drinks, spends her entire time here on the phone, etc - I really couldn’t care less.
I think what adds to my irritation is that she clearly felt she was doing something wrong, otherwise she would have clipped her nails then and there, in our bathroom, next to the bedroom where I am sat working. Instead, she felt the need to remove the clippers from our cupboard, take them upstairs into the kids’ bathroom where she thought I wouldn’t notice, and then return them back to our cupboard. She exited the kids bathroom as soon as she heard me come upstairs, but continued with the clipping once I had returned to my bedroom. It’s this behavior that irks me the most.
She’s left now and I didn’t bring it up. I do think we will have to let her go soon, but that’s more because we need someone who just is more thorough (even though I do not tend to leave shit out in my toilet, as some posters seem to believe). I think the nail clipper might have just been the final straw.
Thanks to those who provided rational feedback (one way or the other) - it has been insightful!