No, it will cut your cam2cam, and it will also say that she has stopped viewing it in the chat/PM.Spying, you can't interact so I am assuming cam2cam won't work for that either, or if it does then that is a big flaw which should be stopped.
I can think of a simple way around this if she wants to do it, but I feel like it's wrong and unfair on that guy paying for the private show as it should be his experience, not yours as well - spying is fine but if the model is watching you in HIS pvt, that is just unfair. I