This happens... especially with a favorita with whom there is some chemistry in addition to p4p. My advice... do a frontal assault... and tell her the truth.
I had a similar experience with a favorita who works(ed) at SL. She didn't quite stalk me, but kept me "under surveillance" during 2 or 3 trips. I took the phone call, e-mails and questions in stride... letting them go in one ear... and then out the other. In spite of the petty bullshit, I still enjoyed being with her...at least for the first part of a trip. But after 2 or 3 days together... I avoided her so that I could find other playmates. I continued this charade for a couple of trips. It came to an end one day while I was sitting at the SL bar chatting up a girl in whom I had interest. I caught sight of my favorita at the front entrance. At this point, I excused myself, and bolted for the backdoor. After returning to my hotel, I thought about what just happened. I said to myself" "WTF, this is my trip... my time and my money!" I was not pissed, but I could see the folly of my actions (or inactions). Sure, I liked this girl alot, but I never had intentions of making any commitment to her other than payment for services rendered. I had a bite to eat, and then returned to SL. I "manned up" and told her the truth. It was not too painful.
I bought her a drink, and told her that I wanted to spend time with other favoritas, but would like to continue seeing her... just not as much. She was not happy... and told me that it was better if we just stopped. I agreed and said "OK." I did not see her again until a subsequent trip later in the year. She was still working at SL. We saw each other... smiled... and half an hour later, we were back in my room doing it again for old time's sake.