I tried to get the cafe scene but it's incredibly difficult. I think it's only achievable whenever Tina & GF are in the cafe together and you go in, if she's giving head then there's a chance that you get the next scene with Evil Darcy.
For the bathroom 3some with Tina & Cass, it's a night event where you deprive the GF of sex and she sneaks out at night. If she's already addicted and you've given permission to bang the other futa's then it's impossible to trigger naturally. You have to do the trick where you wait in your room for you gf, hang out with her and repeat until eventually the night event triggers.
This can take a lot of repetition but it's possible as I have experienced it.
