Is It a Bee Infestation Or Just A Lone Bee?
As mentioned before, there is a species of bee called the Masonry bee that you might find in your walls. They, however, don’t colonize, so wouldn’t cause an infestation inside the walls of a house. Glover needed to be sure that he was dealing with a hive, so he interviewed the family.
Besides the threat to the bees, Glover also had to consider the damage he might do to the house. If it weren’t an infestation, he would have done cosmetic damage to the property for nothing, so he had to be sure.