Reply: granted privacy

It was my youngest nine year old that actually initiated a conversation about masturbation. She claimed her two friends had talked about it at length at a sleepover and she felt that she needed to "Fact Check" them to make sure. We had that conversation. Once we established that it was normal, she asked permission and asked for privacy. I had to knock on her door before entering her room. I was totally OMG WTF my mom would have killed me LOL. She's never been shy and has always had strong opinions. I give her her privacy because not doing it would just cause far more troubles.

OMG the hand held shower LOL
That thing had a "Pulse" setting !!
1st org in shower at eleven years old.
Never got caught, lucky me LOL 😆 

When she was 10, I saw my daughter naked with her legs wide apart on her bed using her electric toothbrush on herself. Her eyes were closed, I could hear her breathing heavily and I knew she was nearing orgasm so I quietly tiptoed away leaving her to her pleasure. I wished I had had an electric toothbrush when I was her age. I had to use the shower head.

OH LOL I envy your daughter !!! 
My mom walked in on me and she forced that dreaded "Mom/Daughter Talk" right then and there on the spot. I have no idea how many times I actually died during that lecture. OMFG !! Actual months went by before I could even just think about trying to masturbate 's goal all  
So "YAY" that you left her to her privacy to explore and learn and feel "safe" in the privacy of her room. 

Damn, you ARE a good mom LOL 😆 ♥️

Purely by chance, as I walk by our daughter's room with an armful of towels, I glanced at the partially opened door of her room and caught a brief glimpse of our daughter humping against her pillow from the refection on her dresser's mirror. 
I paused, just long enough to verify that it was indeed what I thought I saw and there she was. 
I remembered doing the exact same thing when I was ten years old too.
I tip toed away and allowed her to find and reach her orgasm.