How do you handle people who offer an opinion about people you care about when you never asked them for their opinion?

I have a friend that is friends with my family. She is a very strong opinionated person and although I agree with most of her views, when it comes to my family, I never asked her for her opinion except for maybe something like, (Do you think he would like the blue one or the brown one?) but she thinks this gives her license to offer opinions on other things. It really irks me. Shes always giving her two cents as if I don’t know what the f—- I am doing. I’ve been taking care of my family for over 28 years and they are all quite successful and we are all pretty respectful and loving of each other. Where as that is not the case in her family. How do I get her to butt out without offending her. I value her friendship just not her input on things not asked.