Friend thinks I shelter my kid

I have a friend who always has something to say about the way I choose to parent my child.. I told her we all parent differently and have different opinion’s.

I chose not to let my 7 year old walk around with her 10 year old daughter in their neighborhood. For one she’s 7, for two I don’t live in that neighborhood and have no idea who lives there or who comes in and out. I keep a closer eye on my daughter than she does which is fine if that’s what she chooses but it’s put out there like I’m sheltering my child. My daughter doesn’t know what sex is at least to my knowledge but in today’s world, I’m sure she’s heard the word and other kids talking but doesn’t really know what it means. I’ve told her if she ever has any questions about something she hears or sees please come to me first and I’ll explain.. I don’t feel the need to tell my 7 year old daughter what sex is. That’s just me but when I feel the time is right I will… but she thinks I need to talk to her about it. It’s so frustrating and at this point I’m thinking is she even a friend??? It’s all this kind of stuff and so much more. It’s always but think about this and but think about that.