http://www.wheels.ca/columns/article/806438 Apparently people who own expensive European cars are more likely to cheat on their spouse. Audi and Mercedes are 2nd and 3rd in this prestigious category.
Was it around the time you stopped cheating? We might have supporting data here. I'll go call some scientists!
It's because they have devil/angel-eye halo daylights. That directly translates to promiscuity and infidelity.
Owning an Audi or BMW isnt a midlife crisis, I had a 5 series when I was 25, and currently have had my audi for the last 2 years (34 now). All about quality of drive, especially compared to cars like hyundai and ford. Besides they seem to be more readily available in europe than in us. And I can say I have never had an affair or midlife crisis!