Topless Wife at the Tantra Course

My wife landed safely last night. Today she meets up with other people from the tantra course, including the guy who I watched eat her out back in December. This guy really likes her and will most likely request to have sex with her. My wife told me last week she would be open to giving and receiving oral sex with him. Wondering what might happen, if she might want to do more than that with him in the moment and how many times they might get together?