Get in an get a finger stick glucose test at the pediatrician or family doc clinic. Simple and will probably be diagnostic. Usually the urination associated with juvenile diabetes is excessive and constant. Urinary tract infection can also cause it. Eating and drinking a lot associated with a growth spurt should also be considered. That said, he deserves a finger stick glucose test. If negative, no big deal. If positive, your wife's vigilance could save a lot of stress, because often the diagnosis in kids is made when they are very ill and have to be hospitalized.