Hehe...Awesome!
Girlfriends on videogames...nothing better.
My g/f is mainly into Tetris, which I tease her endlessly about since I've got a complete set of Mame roms and dozens of PS2 games to choose from. Even with all that, she bought a GBA
just to play Tetris.
Although, she is playing through the PS2 version of Prince of Persia: Sands of Time, since she likes the romantic storyline. Oh, she also liked SmashTV since we could play together and it helped her blow of steam from a bad day at work.
Any other cool Co-op games I might try to spring on her?
(Especially ones where you can be nice and help one another!)

Sheeesh...