Oddly...She Should Sleep More

I started the day off strong. I got a lot of laundry done, and was powering through cleaning the house. I took a break to run a few errands, and when I returned my wife was up. I have now discovered that once she gets up, my brain takes that as a cue that it is time to stop working on things. I'm not sure if that's due to the lack of time I get to spend with her normally, or if it's because once she's up I can no longer surprise her with any additional progress. It's very odd, though.