There are 2 possible things going on here. 1 your wife is afraid that you will start see other women;because of your car,college women nice car= hookups, that could be her fear. In that case make her rue the decsion of taking your car by dropping the back seats in the SUV and throwing some panties in the the back and spraying some perfume in there as well. Tell her you will be late after class. When confronted tell her one of your class mates need to move some stuff and you and you were helping (HER) because you had the SUV.( Warning only use this if your marriage is strong ie. not thinking of seperation or divorce) This will either piss her way the hell off or make her second guess the switch? 2 her new boyfriend really digs your ride and he ain't giving it up. Either way talk to your wife and get your DAMN CAR BACK BEFORE ITS TOO LATE!