My Girlfriend's seductive sister. "🎭"

"🎭"Your girlfriend of 2 weeks invited you to her house for the first time for some drinking games. She wants to take things slow. You find out fast that her sister does anything but slow. Will you stay faithful? Even though its new? Even though she wants to go slow? Really? Wow, okay I guess good on you. Okay but look at her sister! Still no? Damn! Im at a loss for words.