101KGB World Class Rock radio station has got talent when it comes to designing flash games. Their signature virtual girlfriend series is pretty cool.
There are 2 games in the virtual girlfriend series and they both play up to popular sexual imagery associated with fantasy girls: The wet and wild cowgirl whose not afraid to get dirty and the sexy, classy french maid whose not afraid to clean up (after she gets dirty :))
There is a link to cheat sheets below for both girls that will help you out with commands to give them. There is actually quite a lot of stuff they can do but it can be tricky to figure it out.
VIRTUAL GIRLFRIEND: COWGIRL
VIRTUAL GIRLFRIEND: MAID