Well, like Candace points out in the fifth panel, people who spend a lot of time together sometimes start behaving like an old married couple. I didn’t want that to be the case here. I thought it’d be funnier to make these two look like dad and daughter, butting heads over silly things. I don’t know exactly how much older Bob is than Candace, but it has to be by more than ten years. That combined with the fact that she works for him made this cartoon pretty easy to pull off.