What is she doing here?
"May I help you, Cassiopeia?"
"Will told me to wait for him here while he's filming."
"Don't lie to me. He has back to back scenes. If he really told you that you'd be waiting for him all afternoon."
"That's okay, I'm willing to wait."
Be patient. You literally just said that she could use a little kindness in her life. I put on my standard customer service smile for her.
"That may be so but unfortunately I'm the only person Will has given permission to be in here alone. Since I'm working, I can't wait here for you. I'm afraid you're going to have to leave.
"Listen, sweetie. You may be his little assistant for now but if you want it to stay that way, I suggest you comply with my rules. We will be getting back together and when we do he will be listening to what I tell him to. That means that your job is in my hands and as his fiance you will give me the respect that I deserve. So quit flirting with him and do your job. Kay thanks."