Why do I have trouble drawing the mirror image?

I’ve noticed that I have trouble orienting myself to structures, and rotating them in my head. As an example, here’s one image where I drew the original and then had trouble drawing it’s mirror image. I then asked my mother to do the same and she had no trouble with it.

So why is it that I have trouble drawing the image? What does this indicate, if anything? It seems like it should be simple enough. I’m not saying I could never get it, it just takes me way more time than it should. Thanks for your answers!