I know that it's not a PC game, but Mario Kart is about the only game (other than online puzzle games) that my wife became hooked on. We played it most nights for about a year. If your wife likes racing games, then Mario Kart is probably your best bet. We have Double Dash but it's not that exciting to play co-op (in the same vehicle) because the person riding along gets bored. However, in racing the CPU's we play somewhat co-operatively. I make a point of taking out the other CPU's rather than her. That evens the playing field a little. She's pretty hard to beat now.
Another game with only cartoon-style violence is Lego Star Wars II, which is available for the PC and pretty much every platform. It has co-op play and is entertaining. My wife enjoyed for a bit but we didn't manage to go through it together because my kids were obsessed with playing it with me.
Another game with only cartoon-style violence is Lego Star Wars II, which is available for the PC and pretty much every platform. It has co-op play and is entertaining. My wife enjoyed for a bit but we didn't manage to go through it together because my kids were obsessed with playing it with me.