LET your daughter talk to you... about ANYTHING.
A child, needs to have a person, to talk to, about their life. Good or bad. That person, needs to be their parent whichever one they are more open with or comfortable with.
Because, if your child cannot talk to you about anything... they will go elsewhere to do it. And that means, someone other than you, or friends good or bad, or strangers, and about their bodies and feelings.
This is the way, my late Dad, did things with me. Whereas, my Mom didn't talk to us about anything or she was just so judgmental. So I didn't tell her anything. I talked to, my Dad.
I always tell my kids, they can talk to me about anything, they don't have to keep secrets, and it can be about anything, good or bad and they don't have to fear, talking to me.
They know, that. My kids can be an open book, with me.
That does not mean I am their "friend." I am their MOM. A parent. And as such, I am there to guide them, not make friends with them. But we are close.
My kids are 6 and 10. And they tell me things. Good or bad or just anything.
You TELL your child, you are always there for them, good or bad. So that they know that... and do not have to "guess" at it.