That's a very good question, Mistress. The setup I'm currently working on, I will not be there. I will be at work. I want him to let me know when he arrives at my house, then call me when he leaves, letting me know if he was successful. I find the not knowing, extremely intoxicating. Just sitting in my office, mind racing as I'm on edge wondering what's happening. It'll also prevent me from chickening out and stopping it.
I would eventually love to watch as she's fucked senseless. Your next question. It's an extreme rush, as I jerk off thinking about it.