Well, kids are a different proposition entirely, they're still learning. As adults I think it's wise to think about how we treat our closest people. My husband has a habit of "letting go" on me since he couldn't possibly be unprofessional at work. I've asked him: "Would you ever say that/act that way towards one of your collegues or employees? Of course he always says no. "Wow, It's good to know you value someone you barely know over your wife". It usually gets the point across. I don't get why you would treat a loved one badly, just because you know they won't ditch you if you did. Doesn't knowing that make it less likely that you would take them for granted?