meeting the father is terrifying enough

you try to make a good impression on your new girlfriend's parents, ring the doorbell and the door opens to reveal Gamagori.

I just thought of something, what if the children inherited their father's height condition? Would they constantly be shifting size in order to be taller than the others? Would they eventually expand and become/destroy the universe? Would Ira have to be larger than they are when they are already infinitely large?