Britney was tired. You know how it is, work is getting to you, or the kids are on your last nerve, and all you can do to stay sane is step away and relax. It's a time for reflection and deep breathes. Many people have a little vice they entertain to calm them down- some smoke cigarettes, some get a coffee, and still others sneak a nip of whatever it is that soothes them.
Now let's say that all you do is entertain the vices, where's the break from that? Hello, Bizzaro? You take half a day, and you do some work, and then you get the kids and some nameless miniature version of yourself, from back when you were blond, and you go sit on your boat down at the harbor. You don't actually go anywhere on the boat, but you're on it, and it feels like vacation. It soothes you.
That is until the boys start crying, and then it's back to reality, girlfriend. Smokes and coffee, stat. Cameras be damned.