The bones and cartilage in the nose don't actually grow with time, but the cartilages that form the tip of the nose release their grip on the upper regions of the nose and pull down and away with gravity.  That movement lowers the position of the tip, making the nose look longer, and thus bigger.  Changes in the skin can also make a nose appear bigger.

She also had a mild convexity of a hump along the dorsum of her nose.

You can see that the jowl, the droop of skin between her ear and her chin, was pulled tighter.