Roundabout Invitation

It was around 2:00am in Australia. I was 12 years old on my way home with my brother in his car. We just left our Aunt's house which was a few blocks away from my house. It was a very foggy night with a little to be seen around my brothers car. In between my aunt's and my house there is a roundabout (A round platform the divide the road into four different ways). As our car slowly approached the roundabout, I saw this white shadow, at first it though it was only the fog, but as we got closer and closer to the roundabout the shadow appeared to be a young see-through lady with long blonde hair beckoning me, telling me to go to her. I was shocked!!!!! I didn't know what to do or what to say. I looked at my brother but he didn't seem to notice her at all. He kept on driving closer and closer to the roundabout and the lady's face was clearer and clearer. She was beautiful!!! But pale and I mean pale. She drifted sideways as we were passing the roundabout facing toward us, still beckoning. Too scared to try to figure out what she really was, I turned around and faced the other direction, and when I looked back again she was gone. This was my first time that I have ever encountered a spirit. It was a very scary night. After I got home I asked my brother about it but he didn't seem to know anything, but he said he felt goosebums when we were passing the roundabout. I don't know maybe it was just my imagination.... But I did see something.