If Monica's corruption and level of relationship with Biff meets the requirements, but the scenes with him are still unavailable, then you need to move on to the "Photoshoots" and "Office" storylines.
and as you see in first option needs lvl 2
money aren't essential in this game
you do photoshots for biff
Ep 2 part 1 went to version 16. Episode 2.2 has been renamed ep3 and has just last week had version 6 released.
The bitchy route will have more scenes forced on Monica. The only scene that can only happen for a bitch playthrough that I can think of is one where Monica can involve her former secretary. Every other event can be played with a bitchy or nice Monica. It's not so much if Monica is a bitch or nice overall, more that the game flags who Monica is nice or a bitch too. So for an example if Monica is respectful of Melanie in ep 1 Melanie will go easier on Monica and demand less of Monica in a certain event in ep 2. You as the player can still choose to have Monica go through the worst of any event. The nice route just gives you an option for Monica to avoid some events or parts of events if you choose.
