My personal opinion....she did it to piss you off. It was all planned and I think it was done to put a "thought" in your head. Not much you can do about something that is now in the past. Maybe you need to start having actions rather than words because instead of going golfing....giving your wife the hint that you would be busy.....you should have just did it as a spur of the moment thing...planning ahead....she did!
Actions speak louder than words....and her actions were really loud weren't they?