<human>: Can you give me the gist of the text in a nutshell?

I have hair on armpits sometimes. I'm not embarassed about it and it is not a big deal in any way at all. My grandma, seems to want to make it the biggest deal, especially when other people are around. It would be helpful to know that I am temporarily living with my grandparents right now. Also, she has done the talking about my armpits infront of others thing about 3 times before. Every time I have asked her to stop.

Last night, I stretched my arms and she saw my armpit hair. She commented that I needed to shave, and I said "No, I don't want to." She scoffed and I changed the subject. I guess she still was upset about that though, because today she decided to bring it up infront of my aunt [35 F]. The situation went like this:

*I walk in the kitchen to look for food, Aunt compliments my makeup and I thank her and start to talk about makeup*

"[my name] doesn't shave her armpits, haha."

I was mad at this point. "Yeah, let's talk about my armpits. There's hair on them. So what? Who cares? Why are you so fixated on my body? It's weird." My grandma said "Well it's a hygiene issue!" And then I said "No, it isn't. Girls can use soap. What you're doing is incredibly rude. Just stop." And I walked away.. I heard her starting to talk shit about me as I walked.

Telling her to stop doesn't work. I'm sure a lot of people will say "It's just your grandma" but it feels like my grandma is my bully. She loves to gossip and my little sister has told me tons of hurtful and insulting things she has said about me behind my back. I know that she is just a gossipy person, but how do I stop her from trying to publically humilate me?
<bot>: My grandma keeps pointing out my armpit hair infront of family members. I ask her to stop every time but she doesn't listen. How can I stop this?