That seems weird... there is content for girl up to CL6, as of recent release...
Well i have tried and started the game over from scratch. I never get the opportunity to fume Liz. The cheat option is a workaround to get her to CL 1. Then i can fume her to the next levels.
But with the girlfriends there is another bug. I only had the option to ask where they live once. I chose another option first, and then those options all disappeared forever. I tried everything i could think of.
Still, im gonna give it another go - because i like the game.