Christine locations: Gas Station
Working at the gas station as cashier.
While Monica visits the gas station to resolve payment problems, Christine is in a backroom, talking to her boyfriend who is away for a long time. This conversation leads to video phone sex.
Monica can choose to get the cashier out there by calling for her. Or she can intentionally destroy a bottle of wine to get Christina's attention.
Hint: choosing the option with breaking the wine bottle will lead to more sex scenes and raising Monica's bitchness.
In the night after that incident, Fred can choose to visit Christina to have sex with her.