Honestly you aren’t far off here. I think what is causing the illusion is that her cranium isn’t round enough. Being too pointy gives the illusion of a wider jawline. Her chin is pointy and your cheek lines just need to be more round starting at the chin. A nice arc here would give a more round and full face, her signature. Also her signature is the hair ow it hugs the face. This also helps give the illusion of a smaller face. The eyes need to be closer together and this too helps that same illusion of a slimmer face. You could also extend the bridge of the nose to be longer. All in all you did a great job. You can keep working on you line quality, getting those arcs to be smoother and just keep practicing this drawing from reference as you will improve with mileage. Hope this helps you see where you can improve your future portraits.

