Molding infant's nose?

I have a 4 month old daughter who does not have a high nose bridge (it is not too flat either). My mother-in-law believes that we should apply pressure on around her nose bridge by lightly pinching it several times a day, in order to raise it. Does this really work? My concern is that it might adversely affect her nose, and might even cause the infant discomfort and pain which she cannot express. Is it not one's genetic makeup that ultimately decides the shape and size of the nose and height of the nose bridge?