Best friend keeps asking if me and my partner are intimate?

So I’ve known this friend(girl) for a long time like ten years. We’ve never discussed sex in our relationships and I never would as I don’t feel comfortable telling people even if they are close what goes on between me and my partner.

So the last five times we’ve met without fail she asks if me and My OH are still having sex? I find it weird how every time we meet she brings it up. So my question is, is it weird that she constantly asks me about mine and my partners sex life?

Just to add she has had a boyfriend now for a year and a half and is happy. Also I have never asked her about her sex life in anyway.