When one or both parents were bedwetters there is a greater possibility that their children will be bedwetters too, but that doesn't mean that they certainly will or that all of them will, only that there is an increased possibility. Bedwetting is also much more common in boys than girls so it is not unusual for boys in a family to wet the bed but not the girls. Still, two kids who wet in one family indicates a good possibility that it is hereditary, and most likely inherited from your dad.