Just tell her you'd really like to pick up an M3 to keep the miles off your aveo because you intend to save it for your kids or somethin'. Women eat that **** up lol. An M3 burns less of our precious fossil fuels that a truck and camper lol. Idk, I'm sure you can come up with a reasonable excuse. My girlfriend doesnt mind when I buy cars cuz' I have quite a few, but if I upgrade so does she...thats the deal.