I think my wife is having an affair

She finally found the sidecar in the garage. I'd told her I'd bought it and she went loopy so when it got delivered I didn't mention the fact to her. She wandered down to the garage yesterday morning and saw it for the first time. She said "Hey, that looks great, I can see why you're so pleased with it now".
This is so far out of character that I can only conclude that she is trying to mask a bigger issue.
GC