Her: "So what do you want to do today?"

Me: "We could [go to a certain store, certain restaurant, certain movie, whatever]"

Her: [Nodding] "We could do that."

Translation: I don't really want to, but if you're heart's set on it, I'll go along. Then I'll be in a bad mood the rest of the day. And then if you ask why I'm in a bad mood, I'm not going to tell you why.