You're bored. That's what it all really comes down to. No one cares over there. You're not dangerous without him, so what's there to worry about. He's not here so who cares? Well, you'll show them. Besides, you need to get the slut to realize that you're serious. You can take control whenever you want, so after you get kicked out at the 24 hour mark, you stay in control. You take her back to the hotel she's playing house in. She's got a key, so you just slip it in the door and move quietly into the room. He's sleeping on the couch and you grin. This will just be too easy.
You grab a knife from the kitchen, something long and sharp that will terrify him. You keep her out of your mind, not letting her see, not until you're hovering above him, knife held high. As you bring it down, aiming right for his heart, you let her have control. You watch, laughing as she screams and wakes him. Unfortunately, she manages to change the trajectory of the knife, but whatever. The point was well made.